Secret Service attempts to keep civil rights protesters from White House area
On the 7th of December, Secret Service tried and failed to keep DC Ferguson from the area in front of the White House, claiming "an event" was taking place. In response civil rights protesters went to the sidewalk across from the White House and stayed for a while making as much noise as possible with the announced intention of disrupting the event in question.
Video of march into and protest on area in front of White House