GAA were the initials of an R.N. at Grace Memorial Hospital in Los Angeles, California. Twenty-four hours following Teri Bauer's screening at the hospital after she and Kim Bauer were rescued from their kidnapping by Ira Gaines, GAA called Teri's home number to follow up, but couldn't reach her and left a message. By the time of the second call another day later, it was determined that Teri had been killed. (Findings at CTU)