On November 5, 2009, Major Nidal Hasan shot 43 people at Fort Hood - killing 13. Hasan was able to buy a handgun despite having been under investigation by the FBI for links to terrorism.

It's amazing but true: we can prevent terror suspects from boarding an airplane, but the FBI doesn't have the power to block them from buying dynamite or an AK-47.

It's past time for action. Join more than 500 mayors in Mayors Against Illegal Guns and support legislation to close the Terror Gap.

Tell Congress to fix the federal background check system and keep our country safe.