Gabrielle Giffords' Nurse: 'She Smiles, She Knows' That She's Lucky

Last night's State of the Union turned poignant with a standing ovation for Congresswoman Gabrielle Giffords and the team of heroes that helped save her life. "As we mark this occasion, we are also mindful of the empty chair in this Chamber, and pray for the health of our colleague - and our friend - Gabby Giffords," President Obama said. In the chamber was trauma nurse Tracy Culbert. She's been by Giffords' side since the day of the shooting. Seeing the empty chair that signified Giffords'...Full Story