Paul McCartney and David Grohl onstage together at Seattle’s Safeco Field | Boise Concert Photographer

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Paul McCartney and David Grohl onstage together at Seattle's Safeco Field | Boise Concert Photographer

The stadium erupted when David Grohl, and the other surviving members of Nirvana, came back out onstage with Sir Paul McCartney and his awesome band. They’d been jamming together earlier and wrote a song, which they played for the 50,000+ crowd. copyright ammophotog 2013