Supporters of anti-U.S. Shiite cleric Muqtada al-Sadr wave Iraqi flags as they destroy a symbolic model of a U.S. Army tank during a rally marking the seventh anniversary of the fall of the Iraqi capital to American troops in the holy Shiite city of Najaf, Iraq, Friday, April 9, 2010.(AP Photo/Karim Kadim)
** FILE ** A U.S. Army Black Hawk helicopter with the Charlie Company, Task Force Talon, takes off at a forward operating base south of Marjah, in Helmand province, southern Afghanistan, Friday Feb. 12, 2010. (AP Photo/Brennan Linsley)