Workers unfurl a large American flag to add some patriotic flair to the main entrance of a Capitol Hill landmark. Can you guess which building? Hint: If you are a Senate-side staffer, you are especially likely to pass by (or through) this building on your way to work. Check back next week for the answer. [IMGCAP(1)] Last week we asked you to identify the tribute to American service members at left. The headline was a major hint. It’s the U.S. Navy Memorial on Pennsylvania Avenue Northwest. [IMGCAP(2)]