TEHRAN (Reuters) - Iran's Supreme Leader Ayatollah Ali Khamenei said Monday he was ready to don combat fatigues and give his life in battle if his country were attacked, accusing Washington of seeking any excuse to start a war. The United States and Israel have both rattled sabers over Iran's disputed nuclear program, refusing to rule out air strikes to hinder what they see as Tehran's pursuit of atomic weapons. Khamenei stressed he would remain in the public eye if war came, unlike U.S. officials whom he accused of fleeing for cover after the Sept. 11 attacks in 2001. "If...