The principal cellist with the Los Angeles Philharmonic is celebrating the return of his missing 320-year-old cello. The $3.5 million Stradivarius was stolen from his front porch three weeks ago. Footage from a surveillance camera shows a man on a bicycle riding off with it. A nurse who found the instrument in a garbage dumpster could collect a $50,000 reward. NPR's Mandalit del Barco reports.