Congresswoman still sedated after gunman's attack

Congresswoman Gabrielle Giffords remained heavily sedated and in a critical condition today as investigators sought to understand what motivated a gunman to carry out the assassination attempt in a rampage that left six people dead.

University Medical Centre spokeswoman Darci Slaten said that Giffords underwent two hours of surgery yesterday and has not been conscious since the shooting. She said more information will be released at a news conference in which one of the doctors who operated on Giffords plans to speak.