Finally finished the single player campaign last night on Hardened Difficulty
Okay, I have a few things I need to understand from the story
Spoiler:<
I'm not sure why General Shepard only went bad at the end of the game, but I think it has to do with allowing hostilities between the US and Russia to continue, maybe he had some of idea to return the US to it's former military glory, or avenge the men he lost in the first game when the nuke exploded in the Middle East.
Also, did they ever explain who that VIP in the panic room was? What happened to the President and high level government? The president's bunker was cleared
Wiki said the Price launched a SLBM at the Capital and rigged it to explode in the outer atmosphere, but it could be just as likely that it was an EMP weapon (the mechanics being the same, a modified nuke designed to explode in high attitude). Lastly, I assume the ending sets up for the 3rd game">
I might just be thinking too much for a game like this
EDIT: My first question explained here
http://callofduty.wikia.com/wiki/Shepherd