(CNN) -- President Barack Obama and first lady Michelle Obama will attend Wednesday's memorial service for the victims of last week's shooting rampage at Fort Hood, Texas, a top White House official announced.
Obama vowed after the shootings that "We're going to get to the bottom of exactly what happened" at Fort Hood, where three soldiers were killed and 16 wounded Wednesday afternoon by a soldier who then took his own life. Investigators have identified the killer as Spc. Ivan Lopez, a 34-year-old Iraq war veteran with a history of depression and anxiety.
White House senior adviser Dan Pfeiffer confirmed the trip Sunday morning during an appearance on CBS's "Face the Nation." Obama also addressed the memorial service for an earlier massacre at Fort Hood, in 2009.