Members of Joint Base Charleston sign in for a blood drive at the Air Base gym, June 12, 2014, at Joint Base Charleston, S.C. Team Charleston members had the opportunity to donate blood with the help of the American Red Cross, which utilizes volunteers to aid those in need during emergency situations. (U.S. Air Force photo/Senior Airman George Goslin)

A member of the American Red Cross prepares John Lackey, 628th Security Forces Squadron police officer, to donate blood, at the Air Base Gym, June 12, 2014, at Joint Base Charleston, S.C. Members of JB Charleston had the opportunity to donate blood inside the Air Base gym with the help of the American Red Cross, which utilizes volunteers to aid those in need during emergency situations. (U.S. Air Force photo/Senior Airman George Goslin)

An American Red Cross member prepares materials for blood donation at the Air Base gym, June 12, 2014, at Joint Base Charleston, S.C. Members of JB Charleston had the opportunity to donate with the help of the American Red Cross, which utilizes volunteers to aid those in need during emergency situations. (U.S. Air Force photo/Senior Airman George Goslin)

Members of Joint Base Charleston donate blood at the Base Gym, June 12, 2014, at JB Charleston, S.C. Members of JB Charleston had the opportunity to donate blood with the help of the American Red Cross, which utilizes volunteers to aid those in need during emergency situations. (U.S. Air Force photo/Senior Airman George Goslin)

Potential blood donors wait for their chance to give blood at the Air Base gym, June 12, 2014, at Joint Base Charleston, S.C. Members of JB Charleston had the opportunity to donate blood with the help of the American Red Cross, which utilizes volunteers to aid those in need during emergency situations. (U.S. Air Force photo/Senior Airman George Goslin)