Tea Protesters caused the White house to Lock down.

(Borganic.org) April 15 2009, The Seattle Times reported that Tea party protesters threw what appeared to be a box over the North lawn area. Secret Service locked down the White House until the box was checked with a robot.
White House press was ordered back into the press room for security measures. Law enforcement cleared roadways and the Lafayette Park which is located across the street from the White House.

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