Members of the Kentucky Air National Guard's 123rd Contingency Response Group offload equipment from a Mississippi Air National Guard C-17 at MidAmerica St. Louis Airport in Mascoutah, Ill., on Aug. 6, 2013, as part of Exercise Gateway Relief, a U.S. Transportation Command-directed earthquake-response scenario. The 123rd is joining forces with the U.S. Army's active-duty 689th Rapid Port Opening Element from Fort Eustis, Va., to stand up and operate a Joint Task Force-Port Opening through Aug. 9. A JTF-PO, which combines an Air Force Aerial Port of Debarkation with an Army trucking and distribution unit, ensures the smooth flow of relief supplies into affected areas by airlift, and coordinates their final distribution over land. (U.S. Air National Guard photo by Maj. Dale Greer/Released)