In this July 17, 2010 file photo, violinist Joshua Bell plays his Stradivarius violin from 1713 at the Far Niente winery during its 125th anniversary celebration in Oakville, Calif. The Grammy-winning violinist played for spare change in a D.C. Metro station during a 2007 experiment with The Washington Post, and almost no one paid attention. Now, Bell tells the Post he is planning another public performance in the main hall at Washington's Union Station set for Sept. 30, 2014. (AP Photo/Eric Risberg, file)