Just a few hours from one of the world's largest cities, the Popocatepetl volcano has been coating nearby towns with ash and disrupting flights at Mexico City's airport this week.
Hundreds of explosions have spit lava from the snow-tipped peak of the 17,797-foot Popocatepetl (puh-puh-ka-TEH-pet-tl), threatening to upend the daily lives of the some 25 million people who live within 60 miles of the mountain. While a massive eruption doesn't appear imminent, eruptions are likely to continue in the coming days.
