[IMGCAP(1)] These U.S. and District of Columbia flags are flapping in the cold wind above a plaza in Northwest D.C. Can you name the plaza? One hint: Some D.C. government workers lucky enough to have window offices might look out on the park and the flags. If you’re still not sure, check back next week for the answer. [IMGCAP(2)] Last time we asked you to identify a construction site. The site was at 300 New Jersey Ave. NW.