Clearly, knowing a thing or two about jet aircrafts doesn't make you a reference on chemtrails. "It's just vapor" he says. Yeah, vapor which contains strontium, barium, aluminum, etc. particulates, consistently measured in way above normal concentrations in fields, streams, even on the pristine snow of mount Shasta, always where chemtrails have been observed. Also, this spraying looks completely different than a normal vapor contrail.