"Hey thanks, Butch, great words, great words," Ferguson said. "You know, the space shuttle has changed the way we view the world and it's changed the way we view our universe. There are a lot of emotions today, but one things indisputable -- America's not going to stop exploring.
"Thank you Columbia, Challenger, Discovery, Endeavour and our ship, Atlantis. Thank you for protecting us and bringing this program to such a fitting end. God bless all of you, God bless the United States of America."
-- STS-135 commander, Chris Ferguson