Indeed, when it comes to photojournalistic integrity, Mark remains as old school as it gets. She still shoots film and maintains a strict code against digital tweaking, a policy she says stems from early in her career, when changing a picture was considered wrong. "I am a realist and I believe that the most interesting things come from reality, and that has not changed," Mark says. "I was able to convince people to let me do these projects that were in my mind," she says. "It was like a grant to be able to do what I wanted to do." These days, Mark often creates her own assignments; works on books, some of which include her classic images (Man and Beast, out in March from the University of Texas Press, is the latest); and takes on corporate jobs when they seem right. "You don't stop because you can't stop," she says. "Taking these photos is who I am and what I do."