“You couldmarshal supplies at the airport and fly them in the Haiti no problem.”
Except that (according to news reports) the only working airport in Haiti is already over capacity - even USAF has problems landing with the hords of private planes from everywere landing and taking off. There appears to be no coordinating authority with the relief efforts. Since there is no functioning Haitian government, no one can grant that authority.
Well, then send in some Seebees and US Army COE's and build another airfield. It can't be that hard to do...
Everyone needs to be given a landing slot hours in advance and if you miss it, you go home.