A Maasai warrior jumps to reach a rope during a sporting event dubbed the Maasai Olympics at Kimana, near Kenya's bordertown with Tanzania, on Dec. 15. The event, held every two years since 2012, is an initiative of international conservation groups to offer Maasai warriors an alternative to killing lions as part of their traditional rite of passage.  YASUYOSHI CHIBA/AFP/Getty Images
A Maasai warrior jumps to reach a rope during a sporting event dubbed the Maasai Olympics at Kimana, near Kenya's bordertown with Tanzania, on Dec. 15. The event, held every two years since 2012, is an initiative of international conservation groups to offer Maasai warriors an alternative to killing lions as part of their traditional rite of passage. YASUYOSHI CHIBA/AFP/Getty Images

A Week in World Photos

Soldiers in Yemen, Masai warriors in Kenya, and protesters in France.

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Armed Yemeni men gather in the capital Sanaa to show their support for the Shiite Huthi movement against the Saudi-led intervention on Dec. 13. MOHAMMED HUWAIS/AFP/Getty Images
Armed Yemeni men gather in the capital Sanaa to show their support for the Shiite Huthi movement against the Saudi-led intervention on Dec. 13. MOHAMMED HUWAIS/AFP/Getty Images

Armed Yemeni men gather in the capital, Sanaa, to show their support for the Shiite Houthi movement against the Saudi-led intervention on Dec. 13.

MOHAMMED HUWAIS/AFP/Getty Images
A Maasai warrior jumps to reach a rope during a sporting event dubbed the Maasai Olympics at Kimana, near Kenya's bordertown with Tanzania, on Dec. 15. The event, held every two years since 2012, is an initiative of international conservation groups to offer Maasai warriors an alternative to killing lions as part of their traditional rite of passage.  YASUYOSHI CHIBA/AFP/Getty Images
A Maasai warrior jumps to reach a rope during a sporting event dubbed the Maasai Olympics at Kimana, near Kenya's bordertown with Tanzania, on Dec. 15. The event, held every two years since 2012, is an initiative of international conservation groups to offer Maasai warriors an alternative to killing lions as part of their traditional rite of passage. YASUYOSHI CHIBA/AFP/Getty Images

A Masai warrior jumps to reach a rope during a sporting event dubbed the Masai Olympics at Kimana, near Kenya’s border with Tanzania, on Dec. 15. The event, held every two years since 2012, is an initiative of international conservation groups to offer Masai warriors an alternative to killing lions as part of their traditional rite of passage.

YASUYOSHI CHIBA/AFP/Getty Images
Clowns are reflected in a motorcycle's mirror during the International Clown Day in Guadalajara, Mexico, on Dec. 10. ULISES RUIZ/AFP/Getty Images
Clowns are reflected in a motorcycle's mirror during the International Clown Day in Guadalajara, Mexico, on Dec. 10. ULISES RUIZ/AFP/Getty Images

Clowns are reflected in a motorcycle’s mirror during the International Clown Day in Guadalajara, Mexico, on Dec. 10.

ULISES RUIZ/AFP/Getty Images
Central American migrants hesitate as others climb the Mexico-U.S. border fence in an attempt to cross to San Diego County from Playas de Tijuana, Mexico on Dec. 12. GUILLERMO ARIAS/AFP/Getty Images
Central American migrants hesitate as others climb the Mexico-U.S. border fence in an attempt to cross to San Diego County from Playas de Tijuana, Mexico on Dec. 12. GUILLERMO ARIAS/AFP/Getty Images

Central American migrants hesitate as others climb the Mexico-U.S. border fence in an attempt to cross to San Diego County from Playas de Tijuana, Mexico, on Dec. 12.

GUILLERMO ARIAS/AFP/Getty Images
A fan arrives to watch the AFF Suzuki Cup 2018 final football match between Malaysia and Vietnam at the Bukit Jalil National Stadium in Kuala Lumpur on Dec. 11. MOHD RASFAN/AFP/Getty Images
A fan arrives to watch the AFF Suzuki Cup 2018 final football match between Malaysia and Vietnam at the Bukit Jalil National Stadium in Kuala Lumpur on Dec. 11. MOHD RASFAN/AFP/Getty Images

A fan arrives to watch the AFF Suzuki Cup 2018 final soccer match between Malaysia and Vietnam at the Bukit Jalil National Stadium in Kuala Lumpur, Malaysia, on Dec. 11.

MOHD RASFAN/AFP/Getty Images
An Indian woman leaves the poling booth after casting her vote during Rajasthan's Legislative Assembly election in Jodhpur on Dec. 7. CHANDAN KHANNA/AFP/Getty Images
An Indian woman leaves the poling booth after casting her vote during Rajasthan's Legislative Assembly election in Jodhpur on Dec. 7. CHANDAN KHANNA/AFP/Getty Images

An Indian woman leaves the polling booth after casting her vote during Rajasthan’s Legislative Assembly election in Jodhpur on Dec. 7.

CHANDAN KHANNA/AFP/Getty Images
Illegal firecrackers are detonated in a controlled explosion in Weisskeissel, eastern Germany, close to the Polish border on Dec. 10. PATRICK PLEUL/AFP/Getty Images
Illegal firecrackers are detonated in a controlled explosion in Weisskeissel, eastern Germany, close to the Polish border on Dec. 10. PATRICK PLEUL/AFP/Getty Images

Illegal firecrackers are detonated in a controlled explosion in Weisskeissel, in eastern Germany near the Polish border, on Dec. 10.

PATRICK PLEUL/AFP/Getty Images
A worker cleans a market alleyway after the close of businesses in Hong Kong on Dec. 7. VIVEK PRAKASH/AFP/Getty Images
A worker cleans a market alleyway after the close of businesses in Hong Kong on Dec. 7. VIVEK PRAKASH/AFP/Getty Images

A worker cleans a market alleyway after the close of businesses in Hong Kong on Dec. 7.

VIVEK PRAKASH/AFP/Getty Images
Visitors wearing traditional hanbok walk through Gyeongbokgung palace during snowfall in central Seoul on Dec. 13. ED JONES/AFP/Getty Images
Visitors wearing traditional hanbok walk through Gyeongbokgung palace during snowfall in central Seoul on Dec. 13. ED JONES/AFP/Getty Images

Visitors wearing traditional hanbok walk through Gyeongbokgung Palace during snowfall in central Seoul on Dec. 13.

ED JONES/AFP/Getty Images
A man swims in a partly frozen lake in in Shenyang in China's northeastern Liaoning province on Dec. 10. STR/AFP/Getty Images
A man swims in a partly frozen lake in in Shenyang in China's northeastern Liaoning province on Dec. 10. STR/AFP/Getty Images

A man swims in a partly frozen lake in in Shenyang in China’s northeastern Liaoning province on Dec. 10.

STR/AFP/Getty Images
Syrian children walk in the mud after heavy rain, pushing wheelchairs loaded with items, at a camp for the displaced near the village of Shamarin, close to the border with Turkey in the northern Aleppo province, on Dec. 6. NAZEER AL-KHATIB/AFP/Getty Images
Syrian children walk in the mud after heavy rain, pushing wheelchairs loaded with items, at a camp for the displaced near the village of Shamarin, close to the border with Turkey in the northern Aleppo province, on Dec. 6. NAZEER AL-KHATIB/AFP/Getty Images

Syrian children walk in the mud after heavy rain, pushing wheelchairs loaded with items, at a camp for the displaced near the village of Shamarin, close to the border with Turkey in the northern Aleppo province, on Dec. 6.

NAZEER AL-KHATIB/AFP/Getty Images
An Emirati falconer releases a falcon while on a hunting trip at Al-Marzoom Falconry Reserve southwest of Abu Dhabi on Dec. 8. KARIM SAHIB/AFP/Getty Images
An Emirati falconer releases a falcon while on a hunting trip at Al-Marzoom Falconry Reserve southwest of Abu Dhabi on Dec. 8. KARIM SAHIB/AFP/Getty Images

An Emirati falconer releases a falcon while on a hunting trip at Al-Marzoom Falconry Reserve southwest of Abu Dhabi on Dec. 8.

KARIM SAHIB/AFP/Getty Images
A man rides his bike on Dec. 10 as smoke rises from a fire at the independent national electoral commission's warehouse in Kinshasa, ahead of presidential elections in Democratic Republic of the Congo that have been foreshadowed by violence. JOHN WESSELS/AFP/Getty Images
A man rides his bike on Dec. 10 as smoke rises from a fire at the independent national electoral commission's warehouse in Kinshasa, ahead of presidential elections in Democratic Republic of the Congo that have been foreshadowed by violence. JOHN WESSELS/AFP/Getty Images

A man rides his bike as smoke rises from a fire at the independent national electoral commission’s warehouse in Kinshasa on Dec. 10, ahead of presidential elections in the Democratic Republic of the Congo that have been foreshadowed by violence.

JOHN WESSELS/AFP/Getty Images
Pro-migrant activists demonstrate against U.S. migration policies near the U.S.-Mexico border fence in San Diego County, as seen from Playas de Tijuana, Mexico, on Dec. 10. GUILLERMO ARIAS/AFP/Getty Images
Pro-migrant activists demonstrate against U.S. migration policies near the U.S.-Mexico border fence in San Diego County, as seen from Playas de Tijuana, Mexico, on Dec. 10. GUILLERMO ARIAS/AFP/Getty Images

Pro-migrant activists demonstrate against U.S. migration policies near the U.S.-Mexico border fence in San Diego County, as seen from Playas de Tijuana, Mexico, on Dec. 10.

GUILLERMO ARIAS/AFP/Getty Images
A Pakistani boy carries plastic bags on a cart in Lahore on Dec. 11. ARIF ALI/AFP/Getty Images
A Pakistani boy carries plastic bags on a cart in Lahore on Dec. 11. ARIF ALI/AFP/Getty Images

A Pakistani boy carries plastic bags on a cart in Lahore on Dec. 11.

ARIF ALI/AFP/Getty Images
Palestinian medics evacuate a wounded protester during clashes between Israeli troops and Palestinian demonstrators in Ramallah, near the Jewish settlement of Beit El, in the occupied West Bank on Dec. 13. ABBAS MOMANI/AFP/Getty Images
Palestinian medics evacuate a wounded protester during clashes between Israeli troops and Palestinian demonstrators in Ramallah, near the Jewish settlement of Beit El, in the occupied West Bank on Dec. 13. ABBAS MOMANI/AFP/Getty Images

Palestinian medics evacuate a wounded protester during clashes between Israeli troops and Palestinian demonstrators in Ramallah, near the Jewish settlement of Beit El, in the occupied West Bank on Dec. 13.

ABBAS MOMANI/AFP/Getty Images
Riot police stand guard outside the headquarters of the United Nations in Managua on International Human Rights Day on Dec. 10. Nicaraguan police on Sunday denied protesters permission to march to the Nicaraguan Centre for Human Rights alleging that the agency is "headless" and under investigation of alleged coup actions for their participation in anti-government protests that have left more than 320 people dead. INTI OCON/AFP/Getty Images
Riot police stand guard outside the headquarters of the United Nations in Managua on International Human Rights Day on Dec. 10. Nicaraguan police on Sunday denied protesters permission to march to the Nicaraguan Centre for Human Rights alleging that the agency is "headless" and under investigation of alleged coup actions for their participation in anti-government protests that have left more than 320 people dead. INTI OCON/AFP/Getty Images

Riot police stand guard outside the headquarters of the United Nations in Managua, Nicaragua, on International Human Rights Day on Dec. 10. Nicaraguan police on Sunday denied protesters permission to march to the Nicaraguan Center for Human Rights, alleging that the agency is “headless” and under investigation of alleged coup actions for its participation in anti-government protests that have left more than 320 people dead.

INTI OCON/AFP/Getty Images
An Indian youth sits on a concrete block as waves hit a breakwater at Kasimedu fishing harbour as cyclone Phethai approaches the eastern Indian coast in Chennai on Dec. 16. ARUN SANKAR/AFP/Getty Images
An Indian youth sits on a concrete block as waves hit a breakwater at Kasimedu fishing harbour as cyclone Phethai approaches the eastern Indian coast in Chennai on Dec. 16. ARUN SANKAR/AFP/Getty Images

An Indian youth sits on a concrete block as waves hit a breakwater at Kasimedu fishing harbor in Chennai as Cyclone Phethai approaches the eastern Indian coast on Dec. 16.

ARUN SANKAR/AFP/Getty Images
Fog covers the historic city center of Rome on Dec. 11. TIZIANA FABI/AFP/Getty Images
Fog covers the historic city center of Rome on Dec. 11. TIZIANA FABI/AFP/Getty Images

Fog covers the historic city center of Rome on Dec. 11.

TIZIANA FABI/AFP/Getty Images
A yellow vest protester gestures in front of burning barricades after the announcement of imminent police intervention, as protesters block access to the oil depot in Le Mans, northwestern France, on Dec. 11. JEAN-FRANCOIS MONIER/AFP/Getty Images
A yellow vest protester gestures in front of burning barricades after the announcement of imminent police intervention, as protesters block access to the oil depot in Le Mans, northwestern France, on Dec. 11. JEAN-FRANCOIS MONIER/AFP/Getty Images

A yellow vest protester gestures in front of burning barricades after the announcement of imminent police intervention, as protesters block access to the oil depot in Le Mans, northwestern France, on Dec. 11.

JEAN-FRANCOIS MONIER/AFP/Getty Images
North Korean soldiers are greeted by South Korean soldiers before crossing the Military Demarcation Line inside the Demilitarized Zone to inspect the dismantled North Korean guard post in the central section of the inter-Korean border in Cheorwon, South Korea, on Dec. 12. AHN YOUNG-JOON/AFP/Getty Images
North Korean soldiers are greeted by South Korean soldiers before crossing the Military Demarcation Line inside the Demilitarized Zone to inspect the dismantled North Korean guard post in the central section of the inter-Korean border in Cheorwon, South Korea, on Dec. 12. AHN YOUNG-JOON/AFP/Getty Images

North Korean soldiers are greeted by South Korean soldiers before crossing the Military Demarcation Line inside the Demilitarized Zone to inspect the dismantled North Korean guard post in the central section of the inter-Korean border in Cheorwon, South Korea, on Dec. 12.

AHN YOUNG-JOON/AFP/Getty Images
Weather service technician Rene Sosna uses snowshoes as he crosses the rails of the Harzer Schmalspurbahn narrow gauge train to walk to his workplace at the German Meteorological Service on Brocken mountain, near Schierke in the Harz region, central Germany, after measuring the snow depth on Dec. 12 . KLAUS-DIETMAR GABBERT/AFP/Getty Images
Weather service technician Rene Sosna uses snowshoes as he crosses the rails of the Harzer Schmalspurbahn narrow gauge train to walk to his workplace at the German Meteorological Service on Brocken mountain, near Schierke in the Harz region, central Germany, after measuring the snow depth on Dec. 12 . KLAUS-DIETMAR GABBERT/AFP/Getty Images

Weather service technician Rene Sosna uses snowshoes as he crosses the rails of the Harzer Schmalspurbahn narrow-gauge train to walk to his workplace at the German Meteorological Service on Brocken Mountain, near Schierke in the Harz region, central Germany, after measuring the snow depth on Dec. 12 .

KLAUS-DIETMAR GABBERT/AFP/Getty Images
Turkish-backed Syrian fighters train in a camp in the Aleppo countryside, northern Syria, on Dec. 16. AREF TAMMAWI/AFP/Getty Images
Turkish-backed Syrian fighters train in a camp in the Aleppo countryside, northern Syria, on Dec. 16. AREF TAMMAWI/AFP/Getty Images

Turkish-backed Syrian fighters train in a camp in the Aleppo countryside, northern Syria, on Dec. 16.

AREF TAMMAWI/AFP/Getty Images
Competitors taking part in a chile-pepper-eating contest in a hot spring filled with chile peppers in Yichun City, in China's central Jiangxi Province, on Dec. 9. The winner took 1 minute to eat 20 peppers. STR/AFP/Getty Images
Competitors taking part in a chile-pepper-eating contest in a hot spring filled with chile peppers in Yichun City, in China's central Jiangxi Province, on Dec. 9. The winner took 1 minute to eat 20 peppers. STR/AFP/Getty Images

Competitors take part in a chili pepper-eating contest in a hot spring filled with chili peppers in Yichun City, in China’s central Jiangxi province, on Dec. 9. The winner took one minute to eat 20 peppers.

STR/AFP/Getty Images
A diver wearing a Santa costume swims with fish in the tank at COEX Aquarium in Seoul, South Korea, on Dec. 7. Christmas has become increasingly popular over the years in South Korea, which is the only East Asian country to recognize it as a national holiday. Chung Sung-Jun/Getty Images
A diver wearing a Santa costume swims with fish in the tank at COEX Aquarium in Seoul, South Korea, on Dec. 7. Christmas has become increasingly popular over the years in South Korea, which is the only East Asian country to recognize it as a national holiday. Chung Sung-Jun/Getty Images

A diver wearing a Santa costume swims with fish in the tank at COEX Aquarium in Seoul on Dec. 7. Christmas has become increasingly popular over the years in South Korea, which is the only East Asian country to recognize it as a national holiday.

Chung Sung-Jun/Getty Images
Workers clad in animal costumes, to represent the outgoing year of the dog and incoming year of the wild boar, clean windows on the side of a hotel in Tokyo on Dec. 13. KAZUHIRO NOGI/AFP/Getty Images
Workers clad in animal costumes, to represent the outgoing year of the dog and incoming year of the wild boar, clean windows on the side of a hotel in Tokyo on Dec. 13. KAZUHIRO NOGI/AFP/Getty Images

Workers clad in animal costumes, to represent the outgoing year of the dog and incoming year of the wild boar, clean windows on the side of a hotel in Tokyo on Dec. 13.

KAZUHIRO NOGI/AFP/Getty Images
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