Staff Sgt. Matthew Flowers, an aeromedical evacuation technician with the 18th Aeromedical Evacuation Squadron, performs simulated CPR aboard a U.S. Air Force C-130 Hercules Feb. 15, 2016, during an expeditionary medical support exercise above the Pacific Ocean near Guam. Exercise Cope North 16 enhances humanitarian assistance and disaster relief crisis response capabilities between six nations and lays the foundation for regional cooperation during real-world contingencies in the Indo-Asia-Pacific region. (U.S. Air Force photo by Staff Sgt. Alexander W. Riedel/Released)