WASHINGTON, DC - NOVEMBER 11: Musicians James Hetfield (L) and Kirk Hammett of Metallica perform onstage during "The Concert For Valor" at The National Mall on November 11, 2014 in Washington, DC. (Photo by Kevin Mazur/Getty Images for HBO)
WASHINGTON, DC - NOVEMBER 11: Musicians James Hetfield (L) and Kirk Hammett of Metallica perform onstage during "The Concert For Valor" at The National Mall on November 11, 2014 in Washington, DC. (Photo by Kevin Mazur/Getty Images for HBO)