This was just moments after an intruder was spotted on the White House grounds.<br/> <br />Secret Service called for staff and media to depart the premises. They could be seen filing out of the briefing room and waiting on the sidewalk outside.<br/> <br />The security scare came hours after President Obama and his family departed for Camp David, the presidential retreat in Maryland.<br/> <br />White House staff and media were allowed back on the grounds thirty minutes later.
