At the White House, Secret Service agents lined up shoulder to shoulder, combing the North Lawn and nearby areas for anything an intruder might have left behind beyond the questions of how such an ... more 
At the White House, Secret Service agents lined up shoulder to shoulder, combing the North Lawn and nearby areas for anything an intruder might have left behind beyond the questions of how such an egregious security breach occurred. The Secret Service says it is investigating why it was unable to stop the man before he got inside the White House. Julianna Goldman reports. less 
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Sat, Sep 20, 2014 9:20 PM EDT