The technology is there to implant radio trackers into animals to track their movements from a great distance. Now I put it to you if you set over 1000 terorists free to get back 1 soldier it might be a good idea to be able to track them.And follow them back to the rat nest of thier terrorist leaders. For the sake of arguement lets say the Israelis didnt implant any of those released . Can the palestinian terror leaders take that chance, and welcome those animals back into thier fold? I hope they do. Can anyone say (predator drone) Lets all watch the sky.