Author Dave Cullen and Tom Mauser, whose teenage son was killed in the Columbine massacre, say federal action on gun control is long past due.
Author Dave Cullen and Tom Mauser, whose teenage son was killed in the Columbine massacre, say federal action on gun control is long past due.
The second deadly U.S. mass shooting in a week is putting new pressure on President Joe Biden to deliver on the gun control..