They have been using a number of my photos on their website recently (www.amnestyusa.org) and also for their action guides (see the latest one here).
Below are a few screen shots of some of those photo usages. You'll probably find more if you look around enough (and please do! Amnesty is a great organization worthy to check out).
Website screen shot #1:
Website screen shot #2:
Website screen shot #3:
And the latest Amnesty Core Action guide (see the entire thing with lots more photos here).