If you train at a gym that's embraced functional training, you (hopefully) have a dedicated space for sleds -- that is, the apparatus with the skis on the bottom, a place to stack weights on the top, ...
The U.S. Air Force recovered the hypersonic sled as part of its Hypersonic Sled Recovery (HSR) project. The 846th Test Squadron conducted testing of the hypersonic sled at the Holloman Air Force Base ...