Space Rocket History #148 - Apollo 4: Operation Big Shot
http://spacerockethistory.com/?p=2611

"...our building's shaking here. Our building's shaking! Oh it's terrific, the building's shaking! This big blast window is shaking! We're holding it with our hands! Look at that rocket go into the clouds at 3000 feet!...you can see it...you can see it...oh the roar is terrific!..."  Walter Cronkite - Apollo 4 launch.