Omaha Fire and Rescue Department personnel in personal protective equipment transfer a simulated patient with a highly contagious disease to an ambulance on Offutt Air Force Base, Neb., July 23, 2015, as part of exercise Patriot 15. Three patients with simulated illnesses were airlifted from Volk Field, Wis., to Offutt AFBfor transfer to the University of Nebraska Medical Center’s Biocontainment Unit. The annual exercise, sponsored by the National Guard Bureau, is used to practice domestic operations within the U.S. (U.S. Air Force photo/Delanie Stafford)