Yakti Sitepu, a local farmer, tends to his potato field as Mount Sinabung releases volcanic materials in Kuta Tengah, North Sumatra, Indonesia, Tuesday, June 16, 2015. Thousands of villagers are refusing to leave their homes on the slopes of one of Indonesia’s most volatile volcanoes despite warnings that it is poised for a powerful eruption. (AP Photo/Binsar Bakkara)