Johnny Cash

Spanning the man in black and white to color TV.

See rock and metal musicians who've served in the U.S. Military, including Maynard James Keenan, Fred Durst of Limp Bizkit and more.

You can't be faulted for thinking rock has lost its edge, but at least one vestige of the music's provocative spirit remains.

On March 8, 1994, Nine Inch Nails delivered a dark, destructive masterpiece titled 'The Downward Spiral.'