on 11 july 2021, richard branson and three employees were passengers on a flight, up to an altitude of 86 km (53 mi); the flight had two pilots. however, the rocket plane "unity" flew outside restricted airspace; that happened for 1 minute and 41 seconds. the federal aviation administration allowed [any] spaceshiptwo rocket plane to fly again [from] september 2021, after deciding to expand (or make larger) the restricted airspace around the vehicle's flight range.