KARO, NORTH SUMATRA, INDONESIA - JUNE 19: Material vulcanic is seen into the sky as Mount Sinabung spews pyroclastic smoke, seen from Simpang Empat village on June 19, 2015 in Karo District, North Sumatra, Indonesia. According to The National Disaster Mitigation Agency, more than 10,000 villagers have fled their homes since the authorities raised the alert status of Mount Sinabung erupting to the highest level. (Photo by Ulet Ifansasti/Getty Images)
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Getty Images News Ulet Ifansasti