Waving flags, Iranian school girls attend an annual demonstration in front of the former U.S. Embassy in Tehran, Iran, Nov. 4, 2009, in a ceremony commemorating the 30th anniversary of the seizure of the U.S. Embassy by militant students on Nov. 4, 1979. The poster at top center shows late revolutionary founder Ayatollah Khomeini. (AP Photo/Vahid Salemi)