Image Increased security at a football stadium in New Orleans yesterday.Credit...Edmund D. Fountain for The New York TimesThe New Orleans attacker acted alone, the F.B.I. said Investigators said yesterday that the U.S. Army veteran who plowed a pick

Robert F. Kennedy Jr. began a tour of Capitol Hill this week to pay courtesy calls on senators who will vote on his nomination to be health secretary and to calm concerns that he would limit access to vaccines22win, especially for polio. “I’m all fo