U.S. Army Reserve Spc. Dustin Campbell, a CH-47 Chinook crew chief assigned to Delta Company, 5th Battalion, 159th Aviation Regiment, inspects the aft rotor system of a CH-47 on the tarmac at Fort Eustis, Va., Jan. 10, 2013. Campbell is one of several Reservists serving on active duty orders in support of the Defense CBRN Response Force mission, in which the battalion will deploy eight aircraft and up to 150 personnel within a 24-hour period anywhere in the nation to support relief efforts following catastrophic terrorist or natural disaster events. (U.S. Air Force photo by Staff Sgt. Ashley Hawkins/Released)