Firefighters advance a water line through a C-17 to ensure they do not become hung up, while assisting the attack crew inside the aircraft April 12, 2010, at Joint Base Charleston, S.C. Firefighters from the 628th Civil Engineer Squadron, Fire Emergency Services Flight, practice C-17 egress training to ensure they know how to respond to aircraft mishaps. (U.S. Air Force photo by James M. Bowman/released)

Staff Sgt. Justin Martin takes off his proximity gear after C-17 egress training was completed April 12, 2010, at Joint Base Charleston, S.C. His responsibility is to shut down the aircraft and ensure crew members depart the aircraft safely. Sergeant Martin is a rescue team member with the 628th Civil Engineer Squadron. (U.S. Air Force photo by James M. Bowman/released)

Tech Sgt. Todd Barnett maintains the back up water line for a rapid intervention team during C-17 egress training April 12, 2010, at Joint Base Charleston, S.C. Sergeant Barnett's primary responsibility is to help the attack team if trouble should arise inside the C-17. Sergeant Barnett is a crew chief with the 628th Civil Engineer Squadron. (U.S. Air Force photo by James M. Bowman/released)

Douglas Alexandria services the water hose lines so fire trucks are back in service for future requirements April 12, 2010, at Joint Base Charleston, S.C. Mr. Alexandria is a lead firefighter with the 628th Civil Engineer Squadron. (U.S. Air Force photo by James M. Bowman/released)

Staff Sgt. Mathew Raimo and Staff Sgt. William Jenkins go over aircraft shut down procedures during C-17 egress training April 12, 2010, at Joint Base Charleston, S.C. Firefighters practice C-17 egress training to ensure they know how to respond to aircraft mishaps. Sergeant Raimo and Jenkins are crew chiefs with the 628th Civil Engineer Squadron. (U.S. Air Force photo by James M. Bowman/released)

Roger Schwartz gives a debrief of the C-17 egress training April 12, 2010, at Joint Base Charleston, S.C. Firefighters practice C-17 egress training to ensure they know how to respond to aircraft mishaps. Mr. Schwartz is assistant fire chief for A shift operations with the 628th Civil Engineer Squadron. (U.S. Air Force photo by James M. Bowman/released)