@gungasnake,
another possibility is that militias loyal to Iran did it, readying an ambush of the USA. I can well imagine iran using the defense of Syria as a pretext to take out an aircraft carrier, thus stunning America and in all likelihood chasing us out of the region. the american people have no stomachs for lossing thousands more souls on this lost cause that many think is none of our business. iran is on the ropes a bit, so it is a good time for a dramatic move...a game changer. Iran has two to choose from, but if the Truman is being moved from the Red Sea to the Med they could only get one.