A U.S. Army National Guard member stands watch on a ridge above Nogales, Ariz., on the U.S. border with Mexico, July 19, 2006. The soldiers are currently working with the U.S. Border Patrol in support of Operation Jump Start. U.S. Army photo by Sgt. Jim Greenhill

U.S. Navy Petty Officer 1st Class Timothy Kane, assigned to Mobile Diving and Salvage Unit 2, observes the physical condition of U.S. Naval sea cadets inside the pressure chamber at Naval Amphibious Base Little Creek, Va., July 26, 2006, during a three-week course on explosive ordnance disposal diving operations. U.S. Navy photo by Petty Officer 2nd Class Kitt Amaritnant

Chairman of the Joint Chiefs of Staff U.S. Marine Gen. Peter Pace signs a message on a munition, after seeing a howitzer demo from the 4th Brigade, 25th Field Artillery Regiment unit in Camp Salerno, Afghanistan, July 28, 2006. Defense Dept. photo by U.S. Air Force Staff Sgt. D. Myles Cullen

U.S. Marine General Peter Pace, center, chairman of the Joint Chiefs of Staff, shakes hands wiith a U.S. Air Force airman while visiting Kabul, Afghanistan, July 28, 2006. Defense Dept. photo by U.S. Air Force Staff Sgt. D. Myles Cullen

U.S. Marines from 2nd Battalion, 1st Marine Regiment participate in a military operation in urban terrain exercise July 23, 2006, at the Combined Training Facility on Schofield Barracks, Hawaii, in support of exercise Rim of the Pacific 2006. U.S. Navy photo by Petty Officer 2nd Class Rebecca J. Moat

Seaman Michael Fabel makes his way down a rappel tower wall at Camp Hansen, Japan, July 19, 2006. Corpsmen with B Company, 3rd Medical Battalion, 3rd Marine Logistics Group, participated in a day of rappelling to gain experience in Marine Corps training and build confidence. U.S. Marine Corps photo by Lance Cpl. W. Zach Griffith

Air Force basic military trainees assigned to the 322nd Training Squadron at Lackland Air Force Base, Texas, run through a confidence-building course, July 25, 2006. They began their training June 27, 2006. U.S. Air Force photo by Tech. Sgt. Cecilo Ricardo

Chairman of the Joint Chiefs of Staff U.S. Marine Gen. Peter Pace greets and thanks soldiers for their service outside the American Embassy in Kabul, Afghanistan, July 27, 2006. Defense Dept. photo by U.S. Air Force Staff Sgt. D. Myles Cullen