I live as a private citizen in a very remote Mojave Desert area just outside the perimeter of famous Edwards AFB (California) where most of the USA's (and Britain's) exotic aircraft (secret projects and not so secret ones) take place 24 hours/day. (Incidentally Edwards AFB border's Palmdale where they built the Stealths and who knows what else. I saw the new plane which is bigger than a B2 Stealth, but black and more triangular. Sorry, no photo!)
Living here in this remote area is truly an aviation buff's paradise. While getting ready to run with my dogs I noticed these amusing "eyeglass chemtrails" being created/tested (see below). It was way too hot for ice crystals to form contrails at the relatively low altitude these craft were flying at. Other planes flying at higher altitudes left no contrails. Date of Event: 5/27/03, 10AM.