The D.C. Department of Transportation thought it might "get ahead" on construction of a pedestrian bridge on the Anacostia River Trail. That was, until a pair of Ospreys decided to make a home on top of their construction crane. Now progress has ground to a halt because they're a protected species. Sabri Ben-Achour explains why these birds are such a big deal and how local officials are responding.
[Music: "Free Bird" by Hayseed Dixie from Pickin' On Lynyrd Skynyrd]