Airmen verify mobility paperwork for deploying personnel during a Constant Vigilance deployment exercise at Barksdale Air Force Base, Louisiana, May 5, 2015. Constant Vigilance is an annual Air Force Global Strike Command exercise designed to train and assess the command's ability to support its conventional and nuclear missions. (U.S. Air Force photo/Senior Airman Benjamin Gonsier)
Airmen process through a terminal during a Constant Vigilance deployment exercise at Barksdale Air Force Base, Louisiana, May 5, 2015. Training and exercise participation are critical to Air Force Global Strike Command's ability to respond quickly and effectively to real-world situations. (U.S. Air Force photo/Senior Airman Benjamin Gonsier)
Airmen prepare their gear before processing through a checkpoint during a Constant Vigilance deployment exercise at Barksdale Air Force Base, Louisiana, May 5, 2015. Air Force Global Strike Command conducts training operations and exercises on a regular basis to ensure its forces are ready to perform nuclear deterrence operations and long-range strike missions if and when called upon to do so. (U.S. Air Force photo/Senior Airman Benjamin Gonsier)
Airmen board an aircraft at Barksdale Air Force Base, Louisiana, as part of a Constant Vigilance deployment exercise May 5, 2015. Constant Vigilance is an annual Air Force Global Strike Command exercise designed to train and assess the command's ability to support conventional and nuclear missions. (U.S. Air Force photo/Senior Airman Benjamin Raughton)
A B-52H Stratofortress lands on Barksdale Air Force Base, Louisiana, as part of a Constant Vigilance exercise May 13, 2015. Constant Vigilance is an annual Air Force Global Strike Command exercise designed to train and assess the command's ability to support its conventional and nuclear missions. AFGSC conducts training operations and exercises on a regular basis to ensure its forces are ready to perform nuclear deterrence operations and long-range strike missions when called upon to do so. (U.S. Air Force photo/Airman 1st Class Curt Beach)
A B-52H Stratofortress prepares to land on Barksdale Air Force Base, Louisiana, as part of a Constant Vigilance exercise May 13, 2015. Constant Vigilance is an annual Air Force Global Strike Command exercise designed to train and assess the command's ability to support its conventional and nuclear missions. AFGSC conducts training operations and exercises on a regular basis to ensure its forces are ready to perform nuclear deterrence operations and long-range strike missions when called upon to do so. (U.S. Air Force photo/Airman 1st Class Curt Beach)