Marching on: In Zagreb, Croatia, about 500 people paraded on June 13. Between 50 and 200 ultranationalists held a counterdemonstration filled with angry slogans such as "gays today, pedophiles tomorrow." The banner in the photo above refers to the Stonewall riots, which took place in response to a June 28, 1969, police raid at New York's Stonewall Inn, where many gay people socialized. The riots are seen by many as the modern starting point of the gay rights movement. People marched in other European cities on June 13 as well -- 200,000 in Rome, 2,000 in Athens, and some 3,000 in Strasbourg, France.