31. The heat-seeking missile is designed to travel underwater at supersonic speeds and evade radar. 32. It was intended to be operated at supersonic speeds at medium and high altitudes. 33. The FAA limits aircraft flying at supersonic speeds , but has no restrictions on afterburners. 34. It had a crescent shaped wing and was intended to fly at supersonic speeds . 35. The F-22 is designed to cruise at supersonic speeds , generating a tell-tale shock wave. 36. The pilot has observed an unidentified flying object performing impossible maneuvers at supersonic speeds . 37. Air is heated considerably when compressed by the passage of an aircraft at supersonic speeds . 38. And when that air hits supersonic speeds it produces small shock waves that create drag. 39. There are myriad videos of people speaking just fine inside aircraft traveling at supersonic speeds . 40. Mystique failed but somehow fled Genosha at supersonic speed .