Members of Congress and staff members observe a moment of silence for Rep. Gabrielle Giffords, Arizona Democrat, and other victims of Saturday's shooting rampage, on Monday, Jan. 10, 2011, on the east steps of the U.S. Capitol in Washington. At center are Delegate Eleanor Holmes Norton, D.C. Democrat, and Rep. Emanuel Cleaver II, Missouri Democrat. (AP Photo/Charles Dharapak)

Photo by: Charles Dharapak

Members of Congress and staff members observe a moment of silence for Rep. Gabrielle Giffords, Arizona Democrat, and other victims of Saturday's shooting rampage, on Monday, Jan. 10, 2011, on the east steps of the U.S. Capitol in Washington. At center are Delegate Eleanor Holmes Norton, D.C. Democrat, and Rep. Emanuel Cleaver II, Missouri Democrat. (AP Photo/Charles Dharapak)