Being only slightly familiar with the term Chemtrails, I was amazed at what took place today in the skies over Portland,ME. In what was initially a "bluebird" sky day this morning, I observed up to eleven jets on one occasion criss crossing the skies emitting what could only be Chemtrails, until by sunset the skies were covered with a high thin cloud cover. Having reviewed several websites where comments often stated ChemTrails were nothing more than "Contrails" consisting of 100% water vapor, I beg to differ after several hours of observation and photo taking. Contrails are clearly different and on days of low humidity, like today, they tend to dissipate rather quickly. On higher humidity days they can last considerably longer and spread out in a similar pattern as to what I observed today. However, on 3 occasions I saw these high altitude jets, flying for considerable periods followed by a short contrail, and then begin emitting a much higher volume ChemTrail as the plane slowly flew a different flight path. Today I became a believer!