[IMGCAP(1)] These National Symphony Orchestra musicians joined fellow recording artists last week in a show of support for a bill that would help them gain royalties from stations that broadcast their performances. Here, French horn player Martin Hackleman and tuba player Steve Dumaine made their way around a House office building trying to get the attention of Members and staffers. Can you say which building? Check back next week for the answer. [IMGCAP(2)] Last week we challenged you to figure out where these flags were making their own form of music as they flapped in the wind on a chilly day. They were flying over Freedom Plaza at Pennsylvania Avenue and 14th Street in Northwest D.C.