Just listened to an interview with Robert Frank on NPR (Bob Edwards Weekend). He was discussing his making of "The Americans" among other things. I found it to be highly entertaining. If you want to hear it, I think you can download a podcast of it here:
http://www.bobedwards.info/ftopic844.html&sid=daa92aaf97a422e17a3962c25d159939
http://www.bobedwards.info/ftopic844.html&sid=daa92aaf97a422e17a3962c25d159939