Former Pulitzer prize winner with the LA Times Marissa Roth sets the third of her three in a series of photographic challenges that will have you looking for trees and people! The assignment is a challenge set for the next seven days; a way to think differently about how you approach making your pictures. We'll be fascinated to see what you come up with, so email what you make to the show via the contact page. Supported by our Patron Extra Milers and MPB.com