 It was the first privately funded rocket, but only saw three flights and was discontinued due to a lack of business.More recently, converted Minuteman missiles have been used to power the Minotaur line of rockets produced by Orbital Sciences (nowadays Northrop Grumman Innovation Systems).L-3 Communications is currently using SR-19 SRBs, Minuteman-II Second Stage Solid Rocket Boosters, as delivery vehicles for a range of different re-entry vehicles as targets for the THAAD and ASIP interceptor missile programs as well as radar testing.