New chord in 639-year-long Cage piece

A new chord was scheduled to sound Thursday in the world's slowest and longest lasting concert that is taking a total 639 years to perform. The abandoned Buchardi church in Halberstadt, eastern Germany, is the venue for a mind-boggling 639-year-long performance of a piece of music by U.S. experimental composer John Cage. Read the full piece at Discovery.com.