Hi All, Question: What kind of clouds do persistent contrails create? A persistent contrail is technically a cloud, correct? And given the altitude, it would be a cirrus cloud, correct? The reason i ask is, somebody who viewed my video (Chemtrails and Chemclouds debunked: http://tinyurl.com/cllnq45) made the point that, if contrails form cirrus clouds, then showing cirrus clouds from 1905 is pointless - it proves nothing. I disagree with him. Thoughts?