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 2 National Guard members fatally shot near White House. Greta Thunberg's latest stunt earns her a ban from Venice. Macaulay Culkin is now officially Macauley Macauley Culkin Culkin. A hunting trip for three brothers ended in a double murder. Report an error