Senior Airman Trevor Siebuhr performs an inventory of his toolkit before going onto the flightline, Aug. 29, 2008. The inventory ensures tools are accounted for in the maintenance area, which helps prevent searches for missing tools on the flightline. Siebuhr, a helicopter maintenance apprentice with the 332nd Expeditionary Aircraft Maintenance Squadron, is deployed from Davis-Monthan Air Force Base, Ariz. His hometown is Burlington, Kan.