All Hazmat need to be vigilant to suspicious activity , officials say . K9 teams , bomb squads and SWAT units are deployed in U.S. . Washington , D.C. , Some toughened security will be out of the public eye , officials say . `` Continue your life as normal . Be vigilant , '' Washington vice president says .
All Hazmat need to be vigilant to suspicious activity , officials say . K9 teams , bomb squads and SWAT units are deployed in U.S. . Some toughened security will be out of the public eye , officials say . `` Continue your life as normal . Be vigilant , '' Washington vice president says .