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 Sheriff in Guthrie case says he may have a motive, and a warning. More pics have reportedly emerged from Guthrie home cameras. Have you ever seen an inflated kitten? Meet 'Puff Kitty.' The USPS' latest stamps go low, really low. Report an error