In 1966 General Electric tried this with United States military jets all of which were powered by GE engines. The only supersonic bomber the XB-70A and an F-4, F-5, T-38, and F-104 fighter jets. NASA Chief Test Pilot Joe Walker (F-104 pilot) and Carl Cross (XB-70 co-pilot) were killed.
http://en.wikipedia.org/wiki/North_American_XB-70_Valkyrie#Mid-air_collision
