With the whole show behind us now, and all the information we're going to get, one thing remains unclear to me still. Why exactly did Charles Widmore send the freighter to the island? The team said it was to extract Ben, and if so, why would they do this? Also, why would Charles rig the freighter with the explosives set to go if his top commando Keamy should die? What purpose could that serve? It was a major part of the whole mythology of the show and it's a little hazy for me. I accept that he was in a "bad" role at the time but if his motive was merely to regain control of the island then the self-destruct button strikes me as a strange move to take. Any thoughts?