PETERSON AIR FORCE BASE, Colo. – Staff Sgt. Derrick Grinnell, 21st Civil Engineer Squadron fire inspector 2, explains to Chief Master Sgt. Brendan Criswell, Air Force Space Command command chief, the process of inspecting and assessing any fire hazards in a mechanical room at Peterson Air Force Base, Colo., May 11, 2017. Criswell hopes to expand his shadowing program and glimpse into the lives of enlisted members and their duties here on Peterson AFB, as well as other space wings in the command.

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Keywords: afspc/ccc, air, america, archive, armed, army, chief, criswell, defence, force, forces, mentor, military, navy, reportage, service, serviceman, servicemen, soldier, states, united, usa