FILE - In this May 21, 1995 file photo, a skater rolls past the White House on Pennsylvania Avenue in Washington, shortly after the thoroughfare was closed to vehicular traffic. The Secret Service is boosting security outside the White House following an embarrassing security breach in which an intruder with a knife scaled the White House fence, dashed across the lawn and made it all the way inside before agents managed to stop him. (AP Photo/Joe Marquette, File)