WASHINGTON, DC - JANUARY 10: A U.S. Capitol Police K9 and officer patrol outside the U.S. Capitol January 10, 2011 in Washington, DC. Law enforcement officers have beefed up their presence around the... more 
WASHINGTON, DC - JANUARY 10: A U.S. Capitol Police K9 and officer patrol outside the U.S. Capitol January 10, 2011 in Washington, DC. Law enforcement officers have beefed up their presence around the Capitol following a mass shooting Saturday in Tucson, Arizona, that left six people dead and at least 13 others wounded including U.S. Rep. Gabrielle Giffords (D-AZ) when a gunman opened fire at a public event held at Safeway supermarket. (Photo by Chip Somodevilla/Getty Images) less 
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Getty Images | Photo By Chip Somodevilla / Getty Images
Tue, Jan 11, 2011 2:38 PM EST