The Irish Sea is one of the most nuclear polluted, because of the number of nuclear power stations and facilities on its English, Welsh and Scottish coastlines, and because its partial enclosure leads to a build-up of pollutants.

An amphibious plane carrying former US Republican Senator Ted Stevens crashed into a remote mountainside during a fishing trip, killing Alaska's most beloved political figure and four others and stranding the survivors on a rocky, brush-covered slope overnight.

A former long-serving US senator and at least four other people were killed when a plane crashed near a remote fishing village in Alaska today.