Cole Tomas Allen Faces New Terrorism Charge for White House Correspondents' Dinner Shooting

• Cole Tomas Allen faces a new terrorism charge for the White House Correspondents' dinner shooting.
• The incident occurred in April at the White House Correspondents' Association dinner.
• Allen allegedly shot a Secret Service agent and attempted to enter the ballroom to shoot the president.
• A federal grand jury added the terrorism charge to the existing charges against Allen.
• The terrorism charge carries a potential life sentence.