Yes, they have.[1] [1] http://www.spacex.com/press/2014/05/27/spacex-completes-qualification-testing-superdraco-thruster http://www.spacex.com/press/2014/05/27

Yes, they have.[1] [1] http://www.spacex.com/press/2014/05/27/spacex-completes-qualification-testing-superdraco-thruster http://www.spacex.com/press/2014/05/27/spacex-completes-qual...