There is a firestorm of press tossing around whether Michelle Obama violated protocol in touching the queen.
Protocol, don't touch the queen, Ever. ok well there is exceptions, handshakes, etc.
But apparently the queen had put her hand on Michelle Obama's hand, and Michelle in return put her hand on the back by the shoulder of the queen.
I think there is room for 'interpretation in this', from what I read the queen backed up away a bit, but not sure.
I really liked the outfit Michelle Obama chose, I for one would have gone for something without such a low neckline, but I thought her choice of dress was tasteful.
I remember when Nancy Reagan created such a controversy about Not bowing when she met the queen, I don't know what the protocol was back then, but I do know that U.S dignitaries are not required to bow or curtsy before the queen.
I think there is a lot of room for interpretation in what Michelle Obama did and what the protocol calls for, or the rules that are written in stone.