Boris Johnson, the former mayor of London, waves a Cornish Pasty during the first day of a nationwide bus tour to campaign for a so-called Brexit in Truro, U.K., on May 11.

A protester yells at Venezuelan National Guard members during an opposition march in Caracas, Venezuela, on  May 11.

Employees check Honda Civic vehicles at the quality control station on the production line of the Honda Motor Co. assembly plant in Prachinburi, Prachinburi Province, Thailand, on May 12.

Hindu Sena activists organize a hawan and chant mantras invoking the Hindu Gods to help Republican candidate Donald Trump to win the U.S. presidential election at Jantar Mantar on May 11 in New Delhi, India.

Toxic smoke rises over the housing estate of Nueva Sesena near Madrid after an illegal tyre dump caught fire on May 13.

A student eats a free lunch at school on May 10 in Miao Autonomous Country of Songtao, Guizhou Province, China.

Kashmiri women pray as a head priest (not in picture) displays a holy relic believed to be the hair from the beard of Prophet Mohammed, at the Hazratbal Shrine on the outskirts of on May 13 in Srinagar, India.

A child waits with her family for a travel permit to cross into Egypt through the Rafah border crossing, which is Gaza's only access to the outside world, after Egyptian authorities reopened the crossing in both directions for two days in May 12.

Hadi Waluyo checks mahagony wood while making a guitar in Yogyakarta, Indonesia, on May 11.

People protest during a demonstration against the use of the French constitution's Article 49.3, allowing the government to bypass parliament and force through controversial labor reforms, in Toulouse, France, on May 11.

A man launch a sky lantern in Kiev to mark the 35th birthday of Ukrainian military pilot, Nadiya Savchenko, who is detained in a Russian prison, on May 11.

Sudhir Kumar Patel, a 28-year-old migrant from India cuts metal in Kathmandu, Nepal on May 11.

Residents are seen in the house filled with flood waters after heavy monsoon rains in Semarang, Central Java, Indonesia, on May 13.

Iraqis check the site of a car bomb attack in Sadr City, a Shiite area north of the capital Baghdad, on May 11.

A Palestinian protester, wearing a gas mask, holds a Palestinian flag on May 13 in the West Bank village of Bilin during a march against the construction of Israel's controversial separation barrier and Israeli settlements.

U.S. First Lady Michelle Obama looks at Patrick Dougherty's Shindig at the Smithsonian's Renwick Gallery May 13 in Washington, D.C.

Australia's Dami Im and her team celebrate in the Green Room during the Eurovision Song Contest 2016 semi-final 2 at the Ericsson Globe Arena in Stockholm, on May 12.

A woman is carried on a stretcher during a demo against the impeachment of Brazilian President Dilma Rousseff in front of the National Congress in Brasilia on May 11. Read more about Rousseff's impeachment here.

A man is arested during a demonstration against the impeachment of Brazilian President Dilma Rousseff in front of the National Congress in Brasilia on May 11.

Two young refugees, Fareed and Mohammed, catch up on sleep in a tent that is home to 20 teenage refugees in the camp known as "The Jungle" where they live, on May 9 in Calais, France.

An auction house employee attaches the leg to the skeleton of a Eohippus, during the press preview of a forthcoming sale at Summers Place Auction House on May 11 in Billingshurst, England.