NBC to air special one hour report on Tucson shooting

Arizona Congresswoman Gabrielle Giffords is responding to doctors commands. Doctors say they are optimistic about her odds. Six people were killed and 14 injured, including Giffords, at a rally in Tucson Saturday morning. The suspected gunman, Jared Loughner, is charged with the attempted assassination and other shootings.

NBC News will air a special one hour report on the Tragedy in Tucson tonight at 8 pm ET/7 CT. Brian Williams will anchor from Tucson.

In addition, Lester Holt will anchor Nightly News from Tucson tonight and field anchor portions of Today from there tomorrow morning.

The Tragedy in Tucson special will replace the Hansen Investigations hour originally scheduled for tonight on Dateline. Chris's program will appear at a later date.