LANGLEY AIR FORCE BASE, Va. -- Senior Airman Jason Wakefield, a voice network systems journeyman assigned to the 1st Communications Squadron, checks a set of telephone line cards during a routine inspection of the telephone network system Feb. 21.
More than 18,000 telephone line cards that support every telephone line connected to Langley. No telephone on the network can function without a working telephone line card. (U.S. Air Force photo/Staff Sgt. Eric T. Sheler)