The US Navy is working within the framework of a TSK joint memorandumand the US Army are working together to develop a hypersonic glide vehicle or HGV.

HGVs are transported to exoatmospheric altitudes by a launch vehicle. After reaching hypersonic speed, they separate from the booster rocket and switch to unpowered glide mode. Unlike ballistic missiles, which maintain a largely unchanged trajectory, HGVs maneuver during their gliding phase. This allows you to fly around enemy defense systems and denies the enemy any certainty about the final target of the attack.