A tractor-trailer is backed up to the in-bound cargo dock in the foreground while all outbound cargo trailers have no tractors contracted to deliver the cargo and remain static, Oct. 4, 2013, at Dover Air Force Base, Del. Outbound cargo movement operations quickly came to a stand-still at the Air Force's busiest aerial port, as the government shutdown continues. (U.S. Air Force photo/Greg L. Davis)