When Lord Reagan took office the TV showed the Iranian hostages being released on a split screen. Perhaps the executions for the 9/11 trials could be shown while John Sidney McCain III takes his oath of office.
The detainees will need to be executed on the island. U.S. laws don’t apply there and we’ve thrown international law into the trashcan so they could really come up with some creative and entertaining methods to get rid of them like in Stephen King’s The Running Man and The Long Walk. Those books were set in the “near future” when they were written and are more overdo than hover cars. It would be far more entertaining that the revived American Gladiators.