June 2, 2022 Holloman High Speed Test Track sets record with fastest recovery mission in 30-plus years with reusable sled In late March, the 846th Test Squadron at Holloman Air Force Base, N.M., successfully stopped a reusable sled traveling at 6,400 feet per second on a monorail, making it a historic event for the team’s Hypersonic Sled Recovery, or HSR, effort.Lt. Col. Paul Dolce, Commander, 846th Test Squadron,