Politics | House of Representatives House Chamber Evacuated Over Suspicious Powder Substance determined to be harmless, authorities say By Nick McMaster Posted Sep 13, 2010 2:09 PM CDT Copied A worker climbs the Capitol dome in Washington, Monday, Sept. 13, 2010, doing maintenance. (AP Photo/Manuel Balce Ceneta) The House chamber was evacuated today after a suspicious white powder was found on the gallery floor, the Washington Post reports. "Nothing hazardous was found," a police spokeswoman said this afternoon. The House is still on recess until tomorrow, so only pages were present in the chamber when the powder was discovered. Read These Next Viking Cruises likes to say no. It's paid off. Angel Reese is in hot water with her own team. A pastor's dream factored in the discovery of hiker's remains. Pilot who tried to cut engines won't be going to state prison. Report an error