Here are the Taliban Terrorists Obama Released to Free POW Bowe Bergdahl

[DireStrike]

5. It would need a power supply.

As far as I know there isn't an unpowered tracking device that can be just picked up remotely. If you have to put in batteries, that device will be much larger and easier to detect, and far less healthy to implant, if you can even keep it working inside the body. It would also be very temporary, and you would want to watch these assets for some time before picking them up again. I wonder how long you're supposed to wait when you release prisoners before you can go and try to capture them again. Are you supposed to close your eyes and count to 1000 or something?

There is tech to wirelessly power implanted devices, but it involves the user holding a specific charger near the device in their body. I think that if we had medical devices that could draw ambient power from the human body somehow, they would be on the path to commercialization.

Still, if I'm one of these guys, I'm gonna get an X-ray scan.