"Why do we continue to use those *expletive deleted* double-rotor helicopters? I don't understand why we continue to use Vietnam-era helicopters when our other technology is so much more advanced?" Dont even ask how old the B-52 is. Unfortunately accidents happen. It could have been mechanical or problems associated with night navigation in the desert, illusions, sand, or mechanical failure. It is an extremely challenging flight environment, add to that stress of combat and fatigue the pilots could have been experiencing as well. Keep in mind we lost a Very new Blackhawk helicopter and crew recently here in the states and a Pavehawk just yesterday crash landed in Iraq (crew ok). A new airframe is no guarantee of safety. The V-22 Osprey should replace the CH-46. They are very good at determining what causes accidents in aviation, Im sure they will find the cause. Their lives were not lost in vain. They were protecting every one of us and were on their way back from a mission. I always take pause and deeply realize at hearing news like this exactly where our freedom comes from and how much it costs.