In July 1947 a US rancher found some debris in the New Mexico desert - did it come from an alien spacecraft? Witness hears from the son of one of the US servicemen who investigated the incident, and from Dr David Clarke, expert on UFO history at Sheffield Hallam University.

Plus the first Tamil suicide bombing; a hoard of Anglo-Saxon treasure discovered in an English field; a sex scandal in the USSR during perestroika; and the first non-stop journey around the world in a hot air balloon.

PHOTO: Major Jesse Marcel at Fort Worth, Texas with balloon debris from the Roswell incident - copyright Alamy