By BOB CHRISTIE
PHOENIX (AP) - Bells are expected to ring across Tucson two years to the minute after a mentally ill gunman opened fire at a supermarket where Rep. Gabrielle Giffords was meeting with constituents.
Tuesday morning's commemoration comes against the backdrop of a national gun control debate that has flared since last month's mass school shooting in Connecticut.
Giffords and her husband have called for greater gun control efforts, and they are doing an interview on ABC in which will they will talk about the legacy of the shooting.
A gun control advocate is also holding a weapon buyback in Tucson on the day of the anniversary.
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