Former U.S. Secretary of Defense Donald Rumsfeld (L), former chairman of the Joint Chiefs of Staff retired Gen. Richard Myers and former commander of the U.S. Central Command retired Gen. John Abizaid (R) arrive to testify at the House Oversight and Government Reform committee on Capitol Hill in Washington August 1, 2007 during a hearing on Tillman Fratricide. Pat Tillman, a former NFL football player, was killed on April 22, 2004 in a "friendly fire" incident while serving in the 2nd Army Ranger Battalion in Afghanistan. REUTERS/Yuri Gripas (UNITED STATES)