General Motors has recalled all its cars. "We decided it would just be simpler," CEO Mary Barra said after a series of recalls on new manufactures. The U.S. government is considering combating Sunni militants in Iraq by giving each of them a new G.M. automobile, sort of an automotive version of the I.E.D. (improvised explosive device). ...  I have always been put off at the thought of running a marathon. An event in which the first guy who tried it died just never struck me as a good idea.