She's out to repair relations with the US and she jumps out there and knocks Gitmo?
She must be betting on HRC in 08.
I think it´s more a chill pill for a) the socialists in her government and b) the people who oppose Gitmo overwhelmingly, and have been eagerly looking on how Merkel supported Bush 2002/2003. Of course she will address that topic seriously, but she won´t risk that her visit becomes a failure because of that.