A rocket sled is shown just before launch on the Holloman High Speed Test Track at Holloman Air Force Base, New Mexico. The 9-inch monorail sled was launched as part of the Hypersonic Readiness program, which is a series of tests being conducted by the 846th Test Squadron at Holloman to prepare for future rocket sled testing to support programs and projects including the Hypersonic Test and Evaluation Investment Portfolio and the Air-Launched Rapid Response Weapon, as well as hypersonic sled tests for other customers. (U.S. Air Force photo)