 On 22 April 2010, the U.S. Navy observed Earth Day by conducting a flight test lasting about 45 minutes at Naval Air Station Patuxent River of an F/A-18 Super Hornet – nicknamed the "Green Hornet" – powered by a 50/50 blend of conventional jet fuel and a biofuel made from camelina; the flight was the first of a planned 15 test flights totaling about 23 flight-hours, scheduled for completion by mid-June 2010.In March 2011, the U.S. Air Force successfully tested a 50/50 mix of jet propellant 8 (JP-8) and camelina-derived biofuel in an F-22 Raptor, achieving a speed of Mach 1.5 on 18 March 2011.On September 4, 2011, the U.S. Navy's Blue Angels flight demonstration squadron used a 50/50 blend of camelina biofuel and jet fuel at the Naval Air Station Patuxent River Air Expo, the first time an entire military aviation unit flew on a biofuel mix.