Poland and the world in mourning

Mourners arrive to light candles under a giant cross at Pilsudski Square in Warsaw, Poland, in memory of late Polish President Lech Kaczynski on April 11, 2010. Kaczynski, his wife Maria and leading members of the Polish military and government were killed when the presidential plane they were traveling in crashed while attempting to land at Smolensk, Russia on April 10th. The delegation was on its way to attend memorial services for the thousands of Polish military officers murdered by the Soviets during World War II at Katyn. (Sean Gallup/Getty Images) More photos available here.