Images from Ukraine

Armed men stand guard at the Simferopol airport in the Crimea region of Ukraine, Feb. 28, 2014.

An unidentified gunman aims his assault rifle while he and others block the road toward the military airport at the Black Sea port of Sevastopol in Crimea, Ukraine, Feb. 28, 2014.

Russian troops block the road way towards the military airport at the Black Sea port of Sevastopol in Crimea, Feb. 28, 2014.

Police stand guard at a local parliament in Simferopol, Crimea, Ukraine, Feb. 28, 2014.

Cossacks attend a pro-Russian rally in Simferopol, Crimea, Ukraine, Feb. 28, 2014.

An anti-Yanukovych protester sleeps at a barricade at Independence Square, Kyiv, Feb. 28, 2014.

Two priests pray at a memorial for the people killed in clashes with the police at Kyiv's Independence Square, Feb. 28, 2014.