Given the secretive nature of the technology used during the bin Laden raid, we can assume the public does not know everything there is to know about stealth helicopter development.

There was of course also the stealth helicopters that were used in the raid on Abbottabad that ended in the killing of Osama Bin Laden. Sort of the series of stealth aircraft that you see today ...

The helicopters have been involved in numerous U.S. military operations, including the raid that killed al-Qaida leader Osama bin Laden in May ... It is a commonly used regional aircraft used ...

former Secretary of Defense Leon Panetta describes the stealth 2011 assault on Osama bin Laden's compound in Pakistan. Panetta had a unique vantage point on the raid, which he watched remotely ...