Management of the New York City area’s three major airports is fed up with long lines at security check points, and they have given the Transportation Security Administration an ultimatum: Either shorten the lines or we’ll find someone else to do it. The Port Authority of New York and New Jersey, tasked with running John F. Kennedy, LaGuardia and Newark airports, is threatening to privatize the process of screening passengers before boarding their flight, according to a document sent from the Port Authority to TSA Administrator Peter Neffenger. “We can no longer tolerate the continuing inadequacy of the TSA passenger...