The tzit tzit, knotted fringe at the end of the prayer shawl worn by U.S. Air Force Rabbi, Chaplain (Capt.) Sarah D. Schechter during the evening le'il shabbat service at Joint-Base San Antonio-Lackland, Texas, on Friday, Sept. 4, 2009, symbolize the 613 commandments in the Torah. Schechter is an Operation Iraqi Freedom veteran and considers her deployment there to be one of the highlights of her career. Schechter is the first woman rabbi in the U.S. Air Force. (U.S. Air Force photo/Lance Cheung)