A quartet of FBI Buskers appeared in October alongside the massive Harvard Fogg Museum Construction project. Harvard gives back to the community with free concerts six days a week through 2013.
See a clip of a concert at this link
The FBI buskers overwhelmed the Fogg Concert. Compare by watching the Fogg concert. You cannot hear the daily concert while the FBI quartet performs. It is not clear if these FBI interlopers were invited or had a permit to perform on Broadway.