Following the X-20 program's cancellation in December 1963, completed ASSET vehicles were used in reentry heating and structural investigations with hopes that data gathered would be useful for the development of future space vehicles, such as the Space Shuttle.
Trala cancelación do programa do X-20 en decembro de 1963, os ASSET completados foron usados en investigacións estruturais e de quentamento en reentrada para recoller datos útiles para futuros vehículos, como o transbordador espacial.