Amazing sighting of a possible large cylindrical UFO of about 1km long entering in the active volcano Popocatépetl in central México after an exhalation, recorded on October 25th 2012. TheUFO was reported on TV news in Mexico. Different experts couldn´t find an answer yet…
http://www.ufosonearth.com/site/ufo-entering-volcano-popocatepetl/
If only I knew Spanish.