summarily execute them as spies
send them to an American tribunal for adjudication
treat them as prisoners of war despite not being in uniform
hand them over to the authorities of whatever nation they are captured in
send them for "rendition" in an allied nation
Can't we just turn Congress off and then turn it back on again?
Everything in your life is a reflection of a choice you have made. If you want a different result, don't blame someone else, or expect others to make a change, you should stop complaining and make a different choice. Remember, the circumstances of your birth don't determine the outcome of your life.
As others have said, try them for treason and then execute them.
"I am not among those who fear the people. They and not the rich, are our dependence for continued freedom." -- Thomas Jefferson, 1816 "[F]acts are before ideas." -- Mikhail Bakunin, 1882
He who knows the least obeys the best.