charlie: tell me about irving penn. e greatest picture makers of the 20th century in any medium. for me, it was a pleasure to work on this show. i think we knew a lot about penn. his worker. 165 covers alone. there something about him that i didn't understand, which is that while he was making those great fashion portraits, while he was doing pictures and portraits of citizens, the small trades, he was also making great still lives. he made extraordinary prints. he was a great image maker, but a splendid object maker. that is the story that comes out of the show. charlie: still life in color, and all the portraiture? jeff: most in black and white, except for cover -- color images -- cover images. that's his own story. what did a picture look like in magazine, and how could he transform it later in his life into a next ordinary black and white print? we learn from seeing it on the walls of the museum. charlie: what is the challenge to put together this kind of exhibition? you can do it chronologically, that's easy. jeff: