Obama pays tribute to Tucson shooting victims

US president observes a moment of silence in memory of those killed during a rampage in Arizona
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US President Barack Obama and first lady Michele Obama bow their heads in a moment of silence on Monday to honour those killed and wounded during a shooting in Tucson, Arizona, on January 8, 2011 (Getty Images)
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President Barack Obama called on the nation to observe a moment of silence at 11 am on Monday in memory of those killed during a rampage in Tucson, Arizona. Six people were killed and at least 13, including Rep Gabrielle Giffords, were wounded in the shooting on January 8, 2011 (Getty Images)
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US President Barack Obama and first lady Michele Obama bow their heads in a moment of silence to honour those killed and wounded during a shooting in Tucson (Getty Images)
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Obama called on the nation to observe a moment of silence on Monday at 11 am in honour of the six people killed and at least 13, including US Rep Gabrielle Giffords, wounded when a gunman opened fire at a public event held at Tucson Safeway supermarket (Getty Images)
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US Capitol guide Michael Judge, Theresa Nazario, Terri Womack, wife of US Rep Womack, US Rep Steve Womack and Capitol guide Ara Carbonneau observe a moment of silence at 11 am in the Rotunda of the US Capitol in memory of the victims (Getty Images)
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White House staff observe a moment of silence to honour those killed and wounded during a shooting in Tucson, Arizona (Getty Images)
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A crowd including members of Congress and their staff gather on the East Steps of the House of Representatives for a national moment of silence in honour of the victims (Getty Images)
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Rep Emanuel Cleaver embraces Del Eleanor Holmes Norton after a moment of silence on the East Steps of the House of Representatives in honour of the victims (Getty Images)
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A crowd including members of Congress and their staff gather on the East Steps of the House of Representatives for a national moment of silence in honour of the victims (Getty Images)
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Members of Congress and their staff gather on the East Steps of the House of Representatives for a national moment of silence in honour of the victims (Getty Images)
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Members of Congress and their staff join others on the East Steps of the House of Representatives for a national moment of silence in honour of the victims (Getty Images)
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A crowd including members of Congress and their staff gather on the East Steps of the House of Representatives for a national moment of silence in honour of the victims (Getty Images)
Wed 12 Jan 2011 12:55 PM GST