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 honor of the victims of Saturday's mass shooting in Tucson. Credit: Getty Images
- 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 honor of the victims of Saturday's mass shooting in Tucson.
- 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 honor of the victims of Saturday's mass shooting in Tucson.
- U.S. President Barack Obama and first lady Michele Obama along with White House staff observe a moment of silence to honor those killed and wounded during a shooting in Tucson, Arizona.
- U.S. President Barack Obama and first lady Michele Obama along with White House staff observe a moment of silence to honor those killed and wounded during a shooting in Tucson, Arizona.
- U.S. President Barack Obama and first lady Michele Obama along with White House staff observe a moment of silence to honor those killed and wounded during a shooting in Tucson, Arizona.
- U.S. President Barack Obama and first lady Michele Obama along with White House staff observe a moment of silence to honor those killed and wounded during a shooting in Tucson, Arizona.
- Candles surround portraits of federal judge John Roll and U.S. Rep. Gabrielle Giffords (D-AZ), who were shot January 8, 2011 in Tuscon, Arizona.
- U.S. born children of Mexican immigrants gaze at a makeshift shrine at the University Medical Center, for those killed and wounded during an attack on U.S. Rep. Gabrielle Giffords (D-AZ) on January 9, 2011.
- U.S. born children of Mexican immigrants gaze at a makeshift shrine at the University Medical Center, for those killed and wounded during an attack on U.S. Rep. Gabrielle Giffords (D-AZ) on January 9, 2011.
- Students, parents and teachers attach ribbons to a fence at Mesa Verde Elementary School to honor slain student Christina Green, 9-years-old, on January 9, 2011 in Tucson, Arizona.
- First-grade teacher Melanie Johnston hugs a fellow teacher at an event honoring slain student Christina Green, 9-years-old, at Mesa Verde Elementary School on January 9, 2011 in Tucson, Arizona.
- Rachel Crabb (C), 5-years-old, holds hands with teachers, parents and other students during a moment of silence for her slain classmate Christina Green at Mesa Verde Elementary School.
- A young girl places a rock on a sign at the makeshift memorial outside of the District Office of U.S. Rep. Gabrielle Giffords (D-AZ).
- People gather to pay their respects at a makeshift memorial outside of the District Office of U.S. Rep. Gabrielle Giffords (D-AZ) a day after a gunman allegedly opened fire at the Safeway store in Tucson, Arizona.
- A memorial is set outside of the District Office of U.S. Rep. Gabrielle Gifford's (D-AZ) a day after a gunman allegedly opened fire on a group of people on January 9, 2011 in Tucson, Arizona.
- A makeshift memorial is set outside of the District Office of U.S. Rep. Gabrielle Giffords (D-AZ) a day after a gunman allegedly opened fire during a public event in Tucson, Arizona.
- In this handout image provided by the White House, U.S. President Barack Obama talks with Arizona Governor Jan Brewer on his cell phone.
- A woman drops flowers off outside the office of U.S. Rep. Gabrielle Giffords (D-AZ) in the Longworth House Office Building on Capitol Hill January 8, 2011 in Washington, DC.
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