SpaceX’s first launch vehicle family, the Falcon 1, was the first privately developed liquid fuel launch vehicle to be launched into orbit, and utilized SpaceX’s Merlin and Kestrel engines for its first and second stages, respectively. It was launched five times from Omelek Island between 2006 and 2009 – the Falcon 1e and Falcon 5 variants were planned but never developed. The Falcon 9 v1. 0 series of launch vehicles, utilizing upgraded Merlin engines on both its stages, was developed as part of the United States Air Force’s Evolved Expendable Launch Vehicle program and NASA’s Commercial Orbital Transportation Services program. It was first launched from Cape Canaveral in 2010 and later replaced by the Falcon 9 v1. 1 series in 2013, which was also launched from Vandenberg. The Falcon 9 Full Thrust and Falcon Heavy variants followed in 2015 and 2018, and are both launched from Kennedy, in addition to Cape Canaveral and Vandenberg.