General Motors is recalling nearly 780,000 older-model compact cars in North America. It says a faulty ignition switch can shut of the cars' engines without warning and cause crashes. GM says six people have been killed in 22 crashes related to the problem. All were at high speeds. The recall affects Chevrolet Cobalts from the 2005 through 2007 model years and Pontiac G5s from 2007.