Late-night shows on U.S. networks were preparing to broadcast reruns Monday night, after Hollywood film and TV writers put down their pens and took up picket signs. The first picket lines appeared in New York on Monday morning, where NBC is headquartered, after last-ditch talks Sunday night failed to avert a strike by the Writers Guild of America. In Los Angeles, writers were picketing 14 studio locations in four-hour shifts and say they plan to stay until a new deal is reached. Jay Leno appeared at the Burbank studio to visit picketers, and NBC announced it would broadcast a rerun of his Tonight Show.