A helicopter, one of three carrying officials including President Joko Widodo, is seen flying near Mount Agung, a volcano on the highest alert level, from Penataran Agung Lempuyang temple in Karangasem Regency on the resort island of Bali, Indonesia September 26, 2017. REUTERS/Darren Whiteside TPX IMAGES OF THE DAY 

Ash spews from Mount Sinabung volcano engulfs a mosque at Tiga Serangkai village in Karo Regency, North Sumatra province, Indonesia, June 25, 2015. More than 10,000 people from 12 villages, who are living around the slopes of Mount Sinabung, left their homes and moved to refugee camps, local media reported on Friday. REUTERS/Beawiharta 

European Commission Chairman Jose Manuel Barroso (C) attends a ceremony for the solemn dedication of Brussels' main synagogue "La Regence" as Great Synagogue of Europe in Brussels June 4, 2008. REUTERS/Sebastien Pirlet (BELGIUM)