Gabrielle Giffords, Arizona Congresswoman, Shot in Head at Public Event

Gabrielle Giffords was at the center of what President Obama has described as an "unspeakable tragedy" this morning.The Arizona Congresswoman was one of 18 people shot - 12 of whom are injured, six reportedly killed - during a shooting in Tuscon. The public event was a meeting of constituents that took place outside a Safeway grocery store. Gabrielle Giffords, Arizona Congresswoman, Shot in