Remember this one?
http://www.nytimes.com/1994/10/30/us/gunman-shoots-at-white-house-from-sidewalk.html
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WASHINGTON, Oct. 29 A 26-year-old Colorado man carrying a Chinese-made semi-automatic rifle sprayed the north face of the White House with a score or more of bullets today, piercing both a window and the mansion's remaining aura of invincibility, but injuring no one.
It was the second uncontested attack on the executive mansion in less than six weeks, and it immediately raised anew questions about the safety of a President living not just in the midst of a major city, but barely 50 yards from its six-lane main street.
President Clinton, back just this morning from a four-day trip to the Middle East, was watching a football game in the building's living quarters on the second floor at the time of the attack. Officials said he had heard the crack of gunfire, but they insisted he was never in danger -- all the windows in the central mansion are made of bullet-proof glass. Mr. Clinton's wife, Hillary, was in California, and his daughter, Chelsea, was away.
Moments after the shooting, officials said, at least two passers-by wrestled Francisco Martin Duran to the Pennsylvania Avenue sidewalk, and two uniformed Secret Service agents leaped over the fence surrounding the White House grounds and subdued him.