President Obama speaks at a memorial service for victims of the shooting in Tucson, Arizona, in which Rep. Gabrielle Giffords (D-Arizona) and 13 others were wounded and six people killed on January 8, 2011.

The preliminary agenda for the event is as follows:

Opening music

Native American blessing

Welcome by UA President Robert N. Shelton

Playing of the National Anthem

Remarks by President Shelton

Remarks by UA Student

Remarks by Arizona Gov. Jan Brewer

Remarks by Homeland Security Secretary Janet Napolitano

Remarks by US Attorney General Eric Holder

Remarks by President Obama

Moment of silence