With hundreds of high school students massed at the Capitol to demand gun control, the House instead approved modest legislation on Wednesday to beef up school security without changes to the nation’s gun laws, hoping to answer demands for action a month after the massacre in Parkland, Fla.
Across Capitol Hill, a top F.B.I. official conceded in Senate testimony that his agency had made mistakes in failing to follow up on tips about the gunman.
"We clearly should have done more," David L. Bowdich, the acting deputy director of the F.B.I., told the Senate Judiciary Committee. He said the bureau was doubling the number of supervisors assigned to review tips from the public.