Shelton Orders Shutdown of Space Fence By Mike Gruss | Aug. 6, 2013 A two-mile array that makes up a part of the U.S. Air Force Space Fence. Credit:Navy photo/SpaceNews artist's concept UPDATED 1:45 p.m. EDTWASHINGTON — The U.S. Air Force is shutting down a key part of its network for tracking satellites and orbital debris, possibly as soon as Oct. 1, according to an Aug. 1 memo obtained by SpaceNews.Gen. William Shelton, commander of Air Force Space Command, “has directed that the Air Force Space Surveillance System be closed and all sites vacated” effective Oct. 1, the memo said. The...