Mount Sinabung volcano spews thick volcanic ash, as seen from the town of Brastagi in Karo, North Sumatra province, on May 30, 2017. Sinabung roared back to life in 2010 for the first time in 400 years and after another period of inactivity, erupted once more in 2013 and has remained highly active since. (Photo by Tibta Pangin/AFP Photo)
