The high-octane heavy metal group plays its hit, "The Unforgiven," at a concert in Mexico City in June 2009. Metallica is the subject of a profile on "Sunday Morning" September 29. Footage courtesy of... more 
The high-octane heavy metal group plays its hit, "The Unforgiven," at a concert in Mexico City in June 2009. Metallica is the subject of a profile on "Sunday Morning" September 29. Footage courtesy of Universal Music Group. less 
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