“A series of security threats closed portions of the White House and Capitol Hill on Tuesday.
In the middle of White House Press Secretary Josh Earnest’s daily briefing, officials told all reporters to evacuate the briefing room. The North Lawn of the White House was also cleared.
The Secret Service said a bomb threat had been called in to the DC Metropolitan Police Department targeting the briefing room specifically. The evacuation at the White House came just hours after U.S. Capitol Police received a bomb threat that forced the evacuation of a hearing on the TSA in the Dirksen Senate Office Building.”
Source: White House rooms, TSA hearing evacuated Tuesday – CNNPolitics.com