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The amount of money to maintain and keep that 747 legal to fly would be crazy. Also, the very large fuel cost alone would make me want to not support it. It also limits where it can land to, would require international airports...expect delays for that plane to ever get off in time. The amount of stress that airplane would go through at slow flight and carrying a large pressurized payload is just stupid. The c130 is more than capable. Waste of money and resources.