TODAY   |  January 10, 2011

White House reflects on Tucson tragedy

President Obama will honor the victims of the vicious shooting in Arizona with a moment of silence on the White House’s South Lawn. NBC's Kelly O'Donnell reports.

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This content comes from Closed Captioning that was broadcast along with this program.

>> this morning the president is urging people across the country to observe a moment of silence at 11:00 a.m . eastern time to honor the victims of this attack.

>> reporter: president obama and hiss team will mark that moment on the white house south lawn . i'm told members of congress will also pause to pray and reflect in their states and districts around the country. flags here are already lowered. the president by proclamation asked people to fly flags after half staff around the country. there's a real look now at security and what steps if any need to be taken. at least two members of congress are saying they would publicly be prepared to carry their own personal weapons back in their district if that was needed as a precaution. there's great concern of course about the community within the gabrielle giffords staff. other house offices are providing staff and personnel to try to help them get through this time and to keep the business of the eighth district of arizona going. that's one of the things we're seeing already. it has really rattled this capitol hill community.

>> understandable, kelly o'donnell on capitol hill . kelly, thanks very much. a note for you, nbc news will cover that moment of silence in washington and across the country during a special report , that's 11:00 a.m . eastern time here on nbc.