Poland Solidarity Anniversary

Artists perform during a multimedia performance directed by Robert Wilson titled "Solidarity at Gdansk Shipyard" in Gdansk, Poland,Tuesday, Aug. 31, 2010. The events are part of a series marking 30 years since the massive movement led by Solidarity founder Lech Walesa forced then-ruling communists to sign concessions to striking shipyard workers in Gdansk. The move eventually led to democratic changes in 1989 and spurred sweeping changes across nations in Eastern Europe, which until then were under Moscow's thumb. (AP Photo/Czarek Sokolowski)