The real question is, why do certain factions want to close it so fast; could be they want to sell sections to Friends of Government at the expense of the American taxpayer, considering the Federal Government and Military would be responsible for any short comings; based on the lease.
If 0bama gives gitmo naval base to Castro/Raoul Katie bar the door.
Closing the prison is a different scenerio. Selling fractions of the prison or Gitmo is treason beyond words.