Joel Meyerowitz's new book is called "How I Make Photographs." But nearly 20 years ago he became known for another book, one that documented the armies of workers turning chaos into order after the 9/11 attacks. WNYC's Sara Fishko has more in this Fishko Files.

Joel Meyerowitz's photographs of Ground Zero can be seen in the Phaidon book Aftermath. His latest book, How I Make Photographs, is out now. For more books and photographs, visit joelmeyerowitz.com.