NASA have uploaded a wealth of great photos to Flickr, including all manner of planes, spaceship, men, and, curiously, cows.
Above is a man, research pilot Bill Dana, after testing the HL-10 lifting body in 1969. Below are a bunch of cows which used to live on a patch of Houston land before it was taken over by the goverment to be used for the Manned Spacecraft Center. The land, not the cows.
And this is a spaceship, carrying John Glenn to orbit:
Godspeed, John Glenn. And try to not spend the rest of your working day looking at these. I failed at that, failed big time.