U.S. President Barack Obama on Sunday called on Americans to observe a moment of silence on Monday to honor the victims of a mass shooting in Arizona on Saturday, the White House said.
The shooting happened just after 10 a.m. MST at a supermarket in northwest Tucson on Saturday where Giffords was hosting her first "Congress on Your Corner" of the year. A gunman, identified as 22-year-old Jared Loughner, opened fire, killing six people and injuring 14 others.
