Ooo, great input guys - this gets more and more interesting [and just when i thought the hatch was getting a tad tedious!

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SP - some interesting thoughts there..it is bemusing how someonelike Des would lack curiousity...espcially since he is or was a scientists..dont scientists have a natural lust for knowledge..are they not curious in their very nature? Hmm..something is not right..i think mr Desmond hasnt told us the whole truth personally!
As for how Henry [or whoever] was going to transport all of that food down there, Im not sure? maybe he was expecting help? One thing seems pretty clear though..Henry is not an island 'Other'. In saying that nothing is clear when it comes to lost and I really should rewatch this episode before making such a statement..so take that with a pich of salt..i might change my view come Sunday!
Mushi - WHat a good idea..i forgot about that, i think Graham S mentioned doing that way back when but it totally slipped my mind!
Hmm, "Attending Protocol"..that is most interesting! Could this be the result of Locke failing to push the button in time? Or perhaps like you inferred, it's a regular signal of which Des and Co knew about. Again..perhaps linked to the 'drop'..
So basically someone, somewhere is controlling this..as in someone must've pressed a button or activated the blast doors so that Henry could do his thing.. ..this would or could mean that the computer/button [as has been mentioned] is not relevent to the blast doors...