Best Military Job for POW Rescue Ops?

I'm not sure what to ask; if I go into any branch of the military I know that I want to play a key role in rescuing prisoners of war. It would fulfil a deep place within to know i'm directly intervening between oppression and freedom. Could really be proud of myself for that. But there's sooo many jobs, between all the branches of the military... and I know there's a lot of diversity on Yahoo answers, so any ideas thrown my way I will appreciate! Based on what I say I wanna do, what's a good military job to look into?