Nancy Miller 01.23.12 2:15 AM He played the double-crossing Harvey "Two Face" Dent in Christopher Nolan's The Dark Knight Returns. But here, Aaron Eckhart reveals another side: as volunteer photographer for the humanitarian medical aid organization AmeriCares. Newsletter Get the latest Fast Company stories delivered to your inbox daily. Send I'd also like to receive special Fast Company offers ARE YOU REGISTERED TO VOTE? Register now to make sure you have a voice in the election.