Apollo 11: 'The greatest single broadcast in television history'

When the Eagle spacecraft touched down on the moon's surface on 20 July 1969, a television camera mounted on its side captured the first tentative steps and words of astronaut Neil Armstrong and sent them across hundreds of thousands of miles to hundreds of millions of pairs of eyes glued to television sets.

"Nasa did a brilliant job of marketing the Apollo mission, of feeding reporters rather than keeping everything under the hood," says Tracy Dahlby at the University of Texas at Austin's School of Journalism.