Who killed Bin Laden?

i know we are full shyt for even trying to specualte what happened but just for the hell of it....this sounds like the work of the unit formerly known as 1st Special Forces Operational Detachment Delta, DEVGRU, CIA Special Activites Division, SAS....damn...that must of bin hella cool...i mean this is the type of stuff they make video games about and movies....whats ur take?? who do u think was involved?? how long do u guys think they had this missions planned??