U.S. Air Force Airman 1st Class Amos Hommel, left, and Senior Airman Riley Cusson gear up to climb the radio tower on Joint Base Charleston, S.C., March 23, 2010. Airman Cusson climbed to the top of the 110-foot tower while Airman Hommel climbed halfway. Both Airmen climbed to maintain their climbing certification, which requires a quarterly trip up the tower. Airman Hommel and Airman Cusson are both radio frequency transmissions systems specialists with the 628th Communications Squadron. (U.S. Air Force Photo/Airman 1st Class Lauren Main)

U.S. Air Force Airman 1st Class Amos Hommel tightens his harness while preparing to climb the radio tower on Joint Base Charleston, S.C., March 23, 2010. When climbing the tower it is required to wear a harness which provides support across the lower chest, over the shoulders and around the climber's legs. Airman Hommel is a radio frequency transmission systems specialist with the 628th Communications Squadron. (U.S. Air Force Photo/Airman 1st Class Lauren Main)

U.S. Air Force Senior Airman Riley Cusson prepares to climb the radio tower on Joint Base Charleston, S.C., March 23, 2010. Airman Cusson climbed the tower to maintain his certification and to check line-of-sight to Naval Weapons Station Charleston. Airman Cusson is a radio frequency transmission systems specialist with the 628th Communications Squadron. (U.S. Air Force Photo/Airman 1st Class Lauren Main)

U.S. Air Force Senior Airman Riley Cusson begins his climb up the radio tower on Joint Base Charleston, S.C., March 23, 2010. Airman Cusson scaled the 110-foot tower to maintain his certification while checking the line-of-sight to Naval Weapons Station Charleston. Airman Cusson is a radio frequency transmission systems specialist with the 628th Communications Squadron. (U.S. Air Force photo/Airman 1st Class Lauren Main)

U.S. Air Force Airman 1st Class Amos Hommel begins his ascent up the radio tower on Joint Base Charleston, S.C., March 23, 2010. The 110-foot climb requires extensive safety measures, such as a hard hat, gloves, harness and lanyard. Lanyards which have been subject to impact loading from a fall or a weight test are removed from service and destroyed. Airman Hommel is a radio frequency transmission systems specialist with the 628th Communications Squadron. (U.S. Air Force photo/Airman 1st Class Lauren Main)

U.S. Air Force Senior Airman Riley Cusson continues his ascent up the radio tower on Joint Base Charleston, S.C., March 23, 2010. The objective of the climb was to maintain climbing certification and to check the line-of-sight to Naval Weapons Station Charleston. Airman Cusson is a radio frequency transmission Systems Specialist with the 628th Communications Squadron. (U.S. Air Force Photo/Airman 1st Class Lauren Main)

U.S. Air Force Airman 1st Class Amos Hommel, left, and Senior Airman Riley Cusson take a break while climbing the radio tower on Joint Base Charleston, S.C., March 23, 2010. The Airmen climbed the tower to maintain climbing certification and to check the line-of-sight to Naval Weapons Station Charleston. Airmen Hommel and Cusson are radio frequency transmission systems specialists with the 628th Communications Squadron. (U.S. Air Force Photo/Airman 1st Class Lauren Main)