 You saw the irrigation one, the boxes here, the three irrigation boxes? Oh, that one breaks my heart. In a park here near George Washington University's campus, we're looking for burrows, we're looking for vegetation, trash, different things to basically help us observe and manage the rats better. The holes are in trees and along the sidewalks, and there are a bunch of them. Groups are examining and taking notes. It's part of D.C.'s annual Rodent Control Academy.