Residents in Mayflower, Arkansas, have filed a class-action lawsuit against ExxonMobil after a pipeline rupture that allowed thousands of barrels of heavy crude oil to flow into a residential area. They are seeking more than $5 million in damages. "This Arkansas class action lawsuit involves the worst crude oil and tar sands spill in Arkansas history," read the lawsuit, which was filed Friday in U.S. District Court, Eastern District of Arkansas.