2002 Washington D.C. passes the Anti-Terrorism Act of 2002 which establishes a number of terror-related crimes in the U.S. capital.
2012 Virginia resident Floyd Lee Corkins infamously enters the Family Research Council headquarters in Washington D.C. with several firearms, but is wrestled to the ground by building manager Leo Johnson before he could take a single life. He later claimed that his goal was to intimidate gay rights opponents, and he planned to smear Chick-fil-A sandwiches in the faces of potential victims.
2013 The law is used for the first time as Corkins pleads guilty to committing an act of terrorism while armed, interstate transportation of a firearm and ammunition, and assault with intent to kill while armed. source