Enhanced Moon footage revealed [video 3 min 15 sec]

Nasa has released clips of digitally enhanced footage of the Apollo 11 Moon landing, to coincide with the event's 40th anniversary.

Dick Nafzger, who was a 28-year-old engineer at Nasa when Armstrong and Aldrin landed on the moon, said the results so far were "very exciting".

It is hoped the restoration and enhancement work will be completed by September.