Afghan men shout anti-U.S slogans during a protest outside the U.S. military base in Bagram, north of Kabul February 21, 2012. More than 2,000 Afghans protested outside the main U.S. military base in Afghanistan on Tuesday over a report that foreign troops had improperly disposed of copies of the Koran and other religious items, Afghan officials said. U.S. helicopters fired flares to try to break up the demonstrators.