Stealth Bomber

I was driving to work this morning when all of a sudden a loud chopper motor bike rumbled past my window. The guy was all in black and wearing the cut out bowling ball type helmet. I never saw him approach and he ducked in front of a car and disappeared over a hill never to be seen again. It was then that it hit me .... that must be the same technology the US military paid billions of dollars for to make jets that can't be seen by radars.