General Motors has placed two engineers on paid leave amid a widening scandal over an ignition switch defect linked to at least 13 and potentially hundreds of deaths. GM also added another repair to its recall of 2.6 million cars with faulty ignition switches. The cars will also require new ignition lock cylinders due to a flaw allowing keys to be removed while engines are still running. GM says it has received several hundred complaints about “keys coming out of ignitions.”