I am as big a CTard as there is, but I cannot find ANYTHING to support the idea that the USAF is spraying chemicals from on high.
Contrails were formed even by piston engines during WWII, and they are formed by modern jet engines too. Depending upon temperatures and humidity, and perhaps even the chemical composition of the fuel being burned, contrails form, or do not.
Don't get me wrong--I would not put it past certain rogue elements of the government to do so, but the mere existence of contrails do not a spray program make.
I think we certainly agree on that one!