Stephen Stills

"At this point, it's not about would we get together," he says. "Should we, is the important question."

With David Crosby gone, Nash says "there’s no heart there."

Rockers' charity set featured a tune that hadn't been performed in 57 years.

James Raymond had everyone in rehearsal room crying thanks to his voice, Stills says.

He recalls effect of move to England that saw him collaborating with Jimi Hendrix, Eric Clapton and others.

Benefit concert also included appearances from Willie Nelson, Joe Walsh and more.

Previously unreleased recordings feature a guest appearance by David Crosby.

Despite weekly jams with Neil Young, he has no plans to hit the road.

Former bandmate pays tribute, saying, "He just went to take a nap and didn’t come back."

Light Up the Blues charity show benefiting Autism Speaks will take place in April.