
A man rides his motorbike in front of volcanic materials spewed by Mount Sinabung in Karo, North Sumatra, Indonesia, on Aug. 2, 2017. (Xinhua/YT Haryono)

A man rides his motorbike in front of volcanic materials spewed by Mount Sinabung in Karo, North Sumatra, Indonesia, on Aug. 2, 2017. (Xinhua/YT Haryono)