If that was just an Occupy protester trying to make a forceful point then the US government is not taking it so likely:
International Level: International Guru / Political Participation: 3209 100%
U.S. Capitol Police and the FBI on Friday arrested a Moroccan man who was planning a suicide attack on the Capitol, police and a federal law-enforcement official said.
The man had what he thought was a vest with explosives, but the materials in the vest had been rendered inoperable by law enforcement, Justice Department spokesman Dean Boyd said.
The man had been closely monitored as part of a lengthy and extensive undercover operation, police said, adding U.S. Capitol Police had been "intimately" involved in the investigation.
The public was never in danger, police said.
The official said the person is not connected to a terrorist organization and was acting alone. Ref. CNN
Detained NATO protesters accused of Chicago terror plot
Prosecutors say three men arrested in a raid on a Chicago apartment had planned to attack President Obama's campaign headquarters, Mayor Rahm Emanuel's home and other targets, including police stations and police cars. Ref. USAToday
Chicago Terror Plot
Two more suspects have been charged as part of a group accused of being involved in a terror plot in Chicago during the NATO summit, prosecutors said Sunday. A total of five people have been charged. Prosecutors say the men planned to target President Barack Obama's campaign headquarters, the home of Chicago Mayor Rahm Emanuel, and several other law enforcement and financial sites. Ref. CNN
Massachusetts man pleads guilty in plot to attack Pentagon, Capitol:
A Massachusetts man charged with plotting to attack the Pentagon and the U.S. Capitol with large, remote-controlled model airplanes packed with explosives has agreed to plead guilty, authorities said on Tuesday. Ref. Source 2