Cross-referencing ... http://news.ycombinator.com/item?id=1886631 http://news.ycombinator.com/item?id=1886631 <- This one has lots of comments http://news.yco

Cross-referencing ... http://news.ycombinator.com/item?id=1886631 http://news.ycombinator.com/item?id=1886631 <- This one has lots of comments http://news.ycombinator.com/item?id=1886949 http://news.ycombinator.com/item?id=1886949 http://news.ycombinator.com/item?id=1887890 http://news.ycombinator.com/item?id=1887890 http://news.ycombinator.com/item?id=1888118 http://news.ycombinator.com/item?id=1888118 <- This one has lots of examples and photos and a little math to support the claim that it's just a contrail. In fact, upon checking, this FoxNews submission report is a derivation from this one (8118).