The man who jumped the White House fence this month and sprinted through the front door made it much farther into the building than previously known.
Omar Gonzales managed to overpower one Secret Service officer and ran through much of the main floor, reaching the door of the ceremonial Green Room.
An alarm near the front entrance of the White Househad been muted at what officers believed was a request of the usher’s office.
Gonzalez, who was carrying a knife, dashed past the stairway leading up to the first family’s living quarters.
Gonzalez was then tackled by a counterassault agent at the far southern end of the East Room.
Secret Service Director Julia Pierson has said the breach was "unacceptable" to her, and security measures are being beefed up.
