Oh BS! B-17’s, B-24’s, B-29’s, etc all left contrails in WW2.
http://www.bing.com/images/search?q=b-17+contrails&FORM=HDRSC2
IMO, one would have to be a drooling, mouth breathing, inbred moron (just like jessie ventura) living in their mom’s basement to believe in “chemtrails” or any one of the other conspiracy nutjob stories.
I keep telling you ... those were NOT airplanes. They were either super-secret jets being flown by the Third Reich, or they were alien spacecraft cleverly disguised to look like conventional planes, but equipped with an array of futuristic weapons that would make the Starship Enterprise look like a whaling dinghy.
Yes, piston planes can leave contrails. (I got to sit in a B-17 once; I LOVE warbirds. LOVE).
Please see post #101.