Two soldiers from the Tennessee National Guard are silhouetted against the morning sky while on duty along the U.S.-Mexico border, near Yuma, Ariz. The Guardsmen are working as part of an EIT Entry Identification Team along the border, providing an extra set of eyes and ears for the U.S. Border Patrol. The National Guard is working along the southern U.S. Border as part of Operation Jump Start. (U.S. Air Force photo by Staff Sgt. Dan Heaton)

Airmen from the 184th Civil Engineering Squadron of the Kansas Air National Guard arrive in Yuma, Ariz., to support Operation Jump Start. The airmen will assist in fence building operations along the U.S.-Mexico border in southwestern Arizona. President George W. Bush has ordered the National Guard to the border for two years to support the U.S. Border Patrol as the Border Patrol works to increase its own ranks. (U.S. Air Force photo by Staff Sgt. Dan Heaton.)

An Airman with the Kansas Air National Guard works on part of the fence being erected along the U.S.-Mexico border south of Yuma, Ariz. The Airman is a member of the 184th Civil Engineering Squadron, Kansas Air National Guard, working as part of Operation Jump Start. The operation has Guard units from around the country working with the U.S. Border Patrol to bolster security along the nation's southern border. (U.S. Air Force photo by Master Sgt. Neil Fogg.)

Members of the Kansas Air National Guard work on part of the fence being erected along the U.S.-Mexico border south of Yuma, Ariz. The Guardsmen and women are members of the 184th Civil Engineering Squadron. They are working along the border as part of Operation Jump Start. The operation has Guard units from around the country working with the U.S. Border Patrol to bolster security along the nation's southern border. (U.S. Air Force photo by Master Sgt. Neil Fogg.)

An Airman with the Kansas Air National Guard welds a connection plate to a piece of a wall being built by the National Guard along the U.S.-Mexico border in southern Arizona. The wall is being built by the National Guard as part of Operation Jump Start, in which the National Guard is working with the U.S. Border Patrol to secure the nation's southern border. The cars seen in the background are parked in Mexico. Previously this area, just west of San Luis, Ariz., had no fence to guard the U.S. border. (U.S. Air Force photo by Staff Sgt. Dan Heaton)