Jack Mudurian loves to sing. It's as simple as that. Ask him to sing, and sing he will. Claiming a repertoire of "almost as many songs as Sinatra," Duplex Planet's own David Greenberger challenged him to sing for 45 minutes continuously. Armed with a hand-held tape recorder loaded with a C-90 cassette, they stepped out on to the back porch of the Duplex Nursing Home in Boston, which was where Jack lived. It was a clear June afternoon, the weather was perfect.