North Korean leader Kim Jong Un inspects the successful test-fire of the intercontinental ballistic missile Hwasong-14 at an undisclosed location on July 4, 2017. (STR/AFP/Getty Images)
A Yemeni child suffering from severe malnutrition is weighed at a treatment centre in a hospital in Yemen's northwestern Hajjah province, on November 7, 2018. ESSA AHMED/AFP/Getty Images
A person walks past a 12-story building alleged in a report on Feb. 19, 2013, by the internet security firm Mandiant as the home of a Chinese military-led hacking group after the firm reportedly traced a host of cyberattacks to the building in Shanghai's northern suburb of Gaoqiao. (Peter Parks/AFP/Getty Images)
Poll workers help voters at polling station during early voting for the mid-term elections in the Lakeview Terrace neighborhood of Los Angeles, California on November 4, 2018. ROBYN BECK/AFP/Getty Images
House Intelligence Committee member Rep. Eric Swalwell (D-Calif.) speaks at a news conference about the Trump-Putin Helsinki summit in Washington on July 17. (Chip Somodevilla/Getty Images)
Police tape and memorial flowers are seen on October 28, 2018 outside the Tree of Life Synagogue after a shooting there left 11 people dead in the Squirrel Hill neighborhood of Pittsburgh on October 27, 2018. BRENDAN SMIALOWSKI/AFP/Getty Images
A protester dressed as Saudi Arabian crown prince Mohammed bin Salman and another dressed as U.S. President Donald Trump demonstrate outside the White House in Washington on Oct. 19. (Win McNamee/Getty Images)
U.S. President Donald Trump, Secretary of Defense James Mattis, and Vice President Mike Pence walk into the Pentagon for a meeting January 18, 2018 in Washington, DC. BRENDAN SMIALOWSKI/AFP/Getty Images
U.S. Vice President Mike Pence addresses the Hudson Institute on the administration's policy toward China in Washington, D.C., on October 4, 2018. JIM WATSON/AFP/Getty Images
U.S. President Donald Trump looks up as he sits beside Chinese President Xi Jinping during a tour of the Forbidden City in Beijing on November 8, 2017. (Jim Watson/AFP/Getty Images)
U.S. Defense Secretary Jim Mattis and Chinese Defense Minister Wei Fenghe inspect an honour guard during a welcome ceremony at the Bayi Building in Beijing on June 27, 2018. MARK SCHIEFELBEIN/AFP/Getty Images