Image provided by the Armed Navy Secretariat of Mexico (SEMAR) shows steam and ash rising from the crater of the Popocatepetl volcano in Puebla, Mexico, on July 10, 2013. According to the lastest report from the National Center for Disaster Prevention, during the last 24 hours there have been 39 moderate exhalations of low magnitude in the volcano, and the volcanic alert remains in Phase 3 yellow. [Photo/Xinhua]