President Obama is expected in Arizona today to lead a memorial service for the victims of Saturday’s shooting attack that left Democratic Rep. Gabrielle Giffords critically wounded, six dead and 13 others injured. Doctors say they expect Giffords to survive the attack, but the extent of her recovery remains unknown. The chief neurosurgeon at the University Medical Center, Michael Lemole, assessed Giffords’ progress so far.

Dr. Michael Lemole: “She’s going to take her recovery at her own pace, and I’m very encouraged by the fact that she has done so well. This kind of injury — I think we’ve said it a couple times — a penetrating injury through the skull, really, the survival, let alone recovery, is abysmal. She has no right to look this good, and she does. We’re hopeful, but I do want to underscore the seriousness of this injury and the fact that we all have to be extremely patient.”