sentences:  It also provided support to the U.S. Coast Guard and Honolulu Joint Rescue Coordination Center on an as-available, non-interference basis.Large portions of the Test Group's mission were classified until 1995 when information concerning Project CORONA was declassified.The 6594th was largely concerned with retrieving film canisters, about the size of a garbage can, in midair that had been ejected from some of the United States' earliest spy satellites.