Islamic State claims Berlin Christmas market attack

The Islamic State group claimed responsibility Tuesday for a truck attack on a crowded Berlin Christmas market that German authorities said came right out of the extremist group's playbook, inflicting mass casualties on a soft target fraught with symbolic meaning.The Monday night attack on the popular market by the Kaiser Wilhelm Memorial Church in the heart of former West Berlin left 12 dead and 48 injured - the first mass casualty attack by Islamic extremists carried out on German soil. German