Obama warns Russia as troop movements raise concerns
1 of 1
Unidentified gunmen wearing camouflage uniforms guard the entrance to the military airport at the Black Sea port of Sevastopol in Crimea, Ukraine, Friday.
Photos: State Air Riflery Championships, Oct. 28
Photos: Pahoa lava flow, Oct. 27
Photos: Basketball: UH Wahine Scrimmage, Oct. 26
More Photo Galleries »