Emerson Lake and Palmer

They experimented with the mainstream.

Late Greg Lake’s wife Regina says ‘Emerson, Lake & Palmer’ was a joy to create.

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

The 30-minute prog-rock epic's tale of humans battling computers is heading for the big screen.

Emerson Lake and Palmer struggled to capture '70s-era live shows that were perhaps more outsized than their studio albums.

ELP frontman and crew members were spanked by Salt Lake City police in 1974 incident.

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