California Governor Arnold Schwarzenegger is calling the helicopter crash that killed nine people "a devastating tragedy" and a reminder of the dangers firefighters face on a daily basis. The helicopter was ferrying 10 firefighters, two pilots and a U.S. Forest Service employee back to base camp when it crashed Tuesday night in the Shasta-Trinity National Forest. Four of those aboard were rescued and taken to hospitals. In a statement, Schwarzenegger calls the victims "true heroes" and says "we are eternally grateful for their service and sacrifice."