<iframe width="580" height="385" src="https://www.youtube.com/embed/v2Ksehg1Xjs" frameborder="0" allowfullscreen></iframe> <br>Challenger II, Quad Metropolis Challenger, Quad Metropolis Challenger experimental gentle sport plane. Dan Johnson talks to Dave Goulet proprietor of the Challenger Manufacturing facility ... <br><a href="https://www.youtube.com/watch?v=v2Ksehg1Xjs">source</a>