Who killed osama bin ladan?

As to the specific man, it is nearly impossible for anyone outside a small elite group probably consisting of about 100 people, like those on the mission, Obama, and his top advisors. There is even doubt about exactly who the strike force consisted of beyond seal team six (incidentally the same team involved in the infamous "blackhawk Down" incident in Mogadishu). Most likely, besides the seals there were delta force members, and possibly CIA enforcers and green berets, as well as the support group that was ready to reinforce them, and also relay information back to Washington DC, hovering overhead in chinooks.