Staff Sgt. David Chorpeninng, 366th Fighter Wing survival, evasion, resistance and escape specialist, pops a M-18 smoke grenade Sept. 26, 2019, at Saylor Creek Bombing Range, Idaho. The smoke grenade, emits a colored smoke and can be used in place of the flare for daytime signaling. (U.S. Air Force photo by Airman Antwain L. Hanks)