Stealth Helicopters, Sight And Sound?

The Stealth helicopters are in the news because of the Bin Laden raid. CBS news coverage Are they that new? Listen to Science Friday show examining the Stealth Helicopter. Recently the news reported that it was great that the raid of the Navy seals, had extra helicopter space so that everyone could be taken back to Afghanistan. However, because of the helicopter that did crash, they had to leave Bin Laden's wives behind. They could have given us information on how Bin Laden survived undetected. They had enough room for the crew and the computer equipment confiscated to track and bring down the terrorists. Maybe if they can perfect the sound reduction devices on helicopters the rescue helicopters used to bring patients into high populations around hospitals would appreciate the quiet!