This is why DMK want to destroy the Bridge of Rama to create a shipping lane. It's for their friend LTTE to hide supply consignments inside of. With a commercial shipping lane in place, the LTTE will be able to hide themselves and their shipments amongst the other traffic. DMK hopes to help its friend win the war this way. They are a devious bunch, and there's no underhanded tactic they won't stoop to.