Courtroom Security, Terror Version
In order to have the kind of security that a terror trial demands, people with other business of any kind must be totally excluded from the security perimeter.
Thus, the building to house a trial with the highest security would, of necessity, be a prison. So where is there a prison with both state of the art highest security and courtroom facilities?
Back to Guantanamo.
Whatever the political and symbolic drawbacks, it is safe.