Some concern over Mexico's Popocatepetl volcano

As Mexico’s Popocatepetl volcano continued puffing gas, water vapor and ash into the air Wednesday. The 17,797-foot mountain just 45 miles southeast of Mexico City and known affectionately as “El Popo,” has been dusting towns and crops in a super-fine ash. (May 24) (Production: Vanessa A. Alvarez)