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 It's being called a disturbing trend: paragliders with bombs. Feds cite ChatGPT evidence in arrest of Palisades Fire suspect. Felix Baumgartner's death attributed to his own error. SCOTUS sounds skeptical about law banning gay conversion therapy. Report an error