 The US Space Force's secret space plane, the X-37B, has just set a new orbital endurance record, returning to Earth after 908 days conducting NASA and military science experiments on its sixth flight. For the first time ever, this mission was launched with a service module giving more capacity for payloads. However, this can't be recovered, so it burns up in the atmosphere whilst the X-37B landed at the former shuttle landing facility at the Kennedy Space Center.