President Donald J. Trump speaks during a meeting with Irish Prime Minister Leo Varadkar on Thursday, March 14, 2019 in Washington, DC. (Tom Brenner/Getty Images)
German Chancellor Angela Merkel is pictured during the meeting with Li Keqiang (not pictured), Prime Minister of China, on July 09, 2018 in Berlin, Germany. (Florian Gaertner/Getty Images)
An F-16 fighter pulls up in a steep climb during rehearsals for a public airshow at the military airbase in Taitung on July 9, 2018. (CHRIS STOWERS/AFP/Getty Images)
The United Launch Alliance Delta IV Heavy rocket launches NASA's Parker Solar Probe to touch the Sun from Launch Complex 37 at Cape Canaveral Air Force Station on August 12, 2018. (NASA via Getty Images)
French President Emmanuel Macron (C) gestures next to German Chancellor Angela Merkel (R) and Chinese President Xi Jinping (L) following their meeting at the Elysee Palace in Paris on March 26, 2019. (LUDOVIC MARIN/Getty Images)
A pedestrian walks past a stock indicator board showing the share price of the Tokyo Stock Exchange in Tokyo on December 26, 2018. (KAZUHIRO NOGI/AFP/Getty Images)