April 19 , 1995 , on Twenty years ago , Timothy McVeigh set off a massive bomb in Oklahoma City . Deborah Lauter and Mark Pitcavage : Right-wing extremism should still be taken seriously .
Twenty years ago , on April 19 , 1995 , Timothy McVeigh set off a massive bomb in Oklahoma City . Deborah Lauter and Mark Pitcavage : Right-wing extremism should still be taken seriously .