KYIV: A photo provided by the Ukrainian President's office appears to show an explosion in Kyiv early Thursday, February 24 (Ukrainian President's Office)

KYIV: Long lines of cars heading out of Kyiv, Ukraine, after Russia's attack on Thursday, February 24 (Pierre Crom/Getty Images)

KHARKIV: A wounded woman stands outside a hospital after an attack on the eastern Ukrainian town of Chuhuiv, outside of Kharkiv, on Thursday, February 24 (Aris Messinis/AFP/Getty Images)

BEIJING: Fireworks burst over the Beijing National Stadium at the end of the Winter Olympics closing ceremony  on Sunday, February 20 (James Hill/The New York Times/Redux)

MONTEVIDEO: Lightning strikes during a thunderstorm in Montevideo, Uruguay, on Sunday, February 20 (Mariana Suarez/AFP/Getty Images)