On 23 November 2015, after reaching 100.5 km (62.4 mi) altitude (outer space), the suborbital New Shepard booster successfully performed a powered vertical soft landing, the first time a suborbital booster rocket had returned from space to make a successful vertical landing.[1][2] The test program continued in 2016 and 2017 with four additional test flights made with the same vehicle (NS-2) in 2016 and the first test flight of the new NS-3 vehicle made in 2017.[3][4]