Ask any Palestinian householder, farmer, or market gardener, olive plantation owner, you name it. D9 bulldozers (as used by the Israelis) would raze Gitmo very effectively, in a few hours.
The POWs? If charges can be brought, try them federal court, in fair, open trials. What is wrong with that?
If they cannot charge them with anything (ie the overwhelming majority of Gitmo inmates)... then this implies
lack of guilt. It does not require a stretch of the imagination that most of these people are simply there because they are from Afghanistan who were in the "wrong place at the wrong time", and the Bush administration preferred to keep these guys arbitrarily locked up in legal limbo, rather than lose face.
However... imagine something. It's November, 2001. You are a goat herder's son in Afghanistan. Suddenly a bunch of heavily armed men in uniform burst into your house, automatic weapons blazing. You dive for cover. Your father gets bludgeoned to death, your sister and mother get raped before being shot. You're hiding behind some furniture, listening to everything. Finally you get found. You get beaten up and blindfolded, dragged onto a helicopter and flown somewhere. You get thrown into a cell with only rats for company. Guards occasionally walk by and kick you in the testicles and piss all over you. Then a few days later, barely able to stand, starving and weak, you get marched onto a plane, still blindfolded and in leg irons and handcuffs. When you finally see the light of day, some 24 hours later, you're in an outdoor cell open to the elements, surrounded by razor wire. The sun is blazing, there's no shade and the humidity is 90%. You don't speak English. Nobody explains why you're there, or where you are. You don't have access to a lawyer. They feed you unfamiliar food that upsets your digestion. On regular occasions you get hauled into a room where guards bark questions about subjects you know nothing about. If you don't answer to the satisfaction of the guards, they pour water down your throat. You make stuff up to stop the terror. This goes on for 7 and a half years, until finally, one day in spring of 2009, you're told that you're being freed, and you are to be flown back home to Afghanistan.
That person would have to be the world's most forgiving man not to spend a good part of the rest of his life plotting ways of getting back at his tormentors. And without a legal way of doing such, the only avenue left open would be via the bomb and bullet.
Perhaps these people should not be freed?