Indonesian activists covered with sludge from a mud volcano wallow in dirt during a protest to mark six year anniversary of the Sidoarjo mud eruption in Porong, Sidoarjo, East Java on Tuesday. The mud volcano eruption was triggered six years ago during drilling of a gas exploration well by the company Lapindo Brantas. The mud buried a dozen villages and displaced more than 13,000 Indonesian families from the Sidoarjo district. (EPA Photo/Fully Handoko)