Col. Richard McComb and Chief Master Sgt. Jose LugoSantiago salute after laying a wreath at Joint Base Charleston - Air Base, Sept. 9, during a Retreat ceremony commemorating the 10th anniversary of the 9/11 attacks. During the ceremony, a 9/11 monument,constructed by members of the 437th Maintenance Squadron, was unveiled. McComb is the Joint Base Charleston commander and LugoSantiago is the 628th Airbase Wing command chief. (U.S. Air Force photo/Airman 1st Class Jodi Martinez)

Members of the Joint Base Honor Guard fold the American flag during a Retreat ceremony Sept. 9 at JB CHS - Air Base, commemorating the 10th anniversary of the 9/11 attacks, (U.S. Air Force photo/Airman 1st Class Jodi Martinez)

A Joint Base Charleston C-17A Globemaster III performs a fly-over during a Retreat ceremony to commemorate the 10th anniversary of the 9/11 attacks, Sept. 9 at JB CHS - Air Base. During the ceremony, a 9/11 monument (show here) constructed by members of the 437th Maintenance Squadron, was unveiled. (U.S. Air Force photo/ Staff Sgt. Greg Biondo)