Emerson Lake and Palmer

Rockin' a full half century.

"This is the story as it happened, as the group told it, because this is our own words," band's drummer says.

This was both the boldest move the band ever made, and the beginning of their undoing.

Greg Lake was a hard sell on the seven-part title suite at first.

Keith Emerson and Greg Lake were ready to reunite – even if it meant going on without Carl Palmer.

The U.K. release was an immediate success, peaking at No. 4 on the charts.