Capt. Sam Lingle (left), flight nurse, and Maj. Jeff

Capt. Sam Lingle (left), flight nurse, and Maj. Jeff Barley (right), medical crew director, both from the 137th Aeromedical Evacuation Squadron at Will Rogers Air National Guard Base, Oklahoma City, don oxygen masks during a simulated in-flight emergency while transporting patients aboard a C-17 Globemaster III from the 105th Airlift Wing, Steward Stewart Air National Guard Base, N.Y., en route to Altus Air Force Base, Altus, Okla., Oct. 30, 2017. The flight was part of a wildfire scenario during Vigilant Guard, a North American Command-sponsored, state-wide emergency response exercise held Oct. 30 to Nov. 2, 2017. (U.S. Air National Guard photo by Staff Sgt. Kasey M. Phipps)