Til Valhall to those who perished in this incident. You will not be forgotten, and your contribution to the cause in Afghanistan was profound and honorable. My heart also goes out to the friends and family of the fallen, both in Afghanistan and in the US.
As far as what exactly happened is up to the military investigators to reveal. So I will not get into any speculation as to the weapons used by the Taliban, or who to blame for any operational screw ups. It could be that this shot was the Golden BB, or the lucky shot. Or it could be something that was planned and well coordinated using advanced weapons. Who knows, and it is all speculation until the final reports come out as to what exactly happened. –Matt