I ran across this video at the Truth and Shadows facebook page, and have no answer to it. The video shows a large jet aircraft (military or commercial, I have no idea). It is leaving a pair of contrails, not from the engines, but from the wingtips.
What, you don't believe they do this?Fuel wasting??
What, you don't believe they do this?
Facebook is bad news in any case Jerry. #DeleteFacebook