There are people out there who believe that the contrails of jets might not be the result of normal jet operation. Proponents believe that the potentially harmful ‘chemtrails’ could contain radioactive particles, psycho-active drugs, or anything else that is not the product of normal propulsion. These ‘chemtrails’ are apparently being used as part of a global mind-control conspiracy, weather modification, or even as a suspended military communications network in the air. As with any good conspiracy theory, there are a lot of ‘well-researched’ websites out there if you’re interested in learning more. I looked on “Wikipedia”:http://en.wikipedia.org/wiki/Chemtrails, but it’s more entertaining to check out “Chemtrail Central”:http://www.chemtrailcentral.com/ (photo credit), “Anomalies Unlimited”:http://www.anomalies-unlimited.com/Chemtrails.html, and “Chemtrails 911”:http://www.chemtrails911.com/.
(Thanks Dave)