Atlantic Records president Ahmet Ertegun suggested Neil Young, who now had his own band called Crazy Horse, as another guitarist for the group. Stills wasn't sure if Young would work out, but gave him a chance. He fit in so well that CSN made him a full-time member, and added his name to theirs. Young was able to both play with CSN, and keep his own place with Crazy Horse. Their second show as a quartet was at the Woodstock Festival, in August 1969. They toured for the next several months, and released a second album, "Déjà Vu", early the next year. They made another performing tour, to support the album, which was also a huge hit.