The Defense Courier Service (DCS),is established under the
United States Transportation Command (USTRANSCOM), and is a global courier network for the expeditious, cost-effective, and secure distribution of highly classified and sensitive material. Operational control of global courier activities is exercised through USTRANSCOM's Defense Courier Division (TCJ3-C). The division oversees and synchronizes activity of 18 courier stations world-wide to service over six-thousand accounts. Major accounts include the White House, the Department of Defense, the Department of State, other federal agencies, authorized government contractors, and allied nations.
See more at Wikipedia.org...