Questions abound after Arizona shooting

Flowers for Giffords
Candles and flowers are placed outside the office of U.S. Rep. Gabrielle Giffords, D-Ariz. in Tucson, Ariz. on Saturday, Jan. 8, 2011 after Giffords and others were shot outside a Safeway grocery store as she was meeting constituents.
Chris Morrison/ASSOCIATED PRESS

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