A man acting erratically on a train headed for Chicago was spotted by a rail worker who called police. Officers found guns and a pamphlet about crowd control in his carry-on bag — and a plan for a mass casualty event.
Almost two years later, federal authorities say the man charged with attempting to assassinate President Donald Trump at the White House Correspondents Association dinner on Saturday was arrested with a shotgun and a semiautomatic pistol he brought with him to Washington, D.C., on an Amtrak train from California.
