 Starting in the mid 2000s, VTVL was under intense development as a technology for reusable rockets large enough to transport people, with two companies, Blue Origin (New Shepard) and later SpaceX (Falcon 9), both having demonstrated recovery of launch vehicles after return to the launch site (RTLS) operations, with Blue Origin's New Shepard booster rocket making the first successful vertical landing on November 23, 2015 following a test flight that reached outer space, and SpaceX's Falcon 9 flight 20 marking the first landing of a commercial orbital booster roughly a month later, on December 22, 2015.VTVL rockets are not to be confused with aircraft which take off and land vertically which use the air for support and propulsion, such as helicopters and jump jets which are VTOL aircraft.The test vehicle made eight successful test flights in 2012–2013.