According to Flight International, carriers, principally Air New Zealand, Continental, United and Air Pacific, have to find a cost effective way to keep Johnson Atoll's airport open after the USAF departure in mid-2004.
1. Paying to maintain the runway
2. Adding 20min to flying time
3. Lobying US to continuing operations at Johnson
3. Looking at an alternate alternate airport like Christmas Island (to be redeveloped as it is currently restricted to 737 ops) or Mujaro but it will probably still force airlines to fly longer ETOPS routes
Anyway it will cost a lot of money.
I think twins should be only use over lands, they are not enough flexible over seas