Our resident critic, Matthew Radcliff is back with a new review. Radcliff from Paignton Pictures, who updates the Documentary Round-Up list of docs screening around the DC area, provides occasional reviews of documentaries you should know about. This time around it's Ilisa Barbash and Lucien Castaign-Taylor's Sweetgrass. The film will be playing at the AFI Silver on March 20 at 3pm as part of the Environmental Film Festival. It opens for a limited theatrical run at Landmark's E Street theater on May 21.