28 June 1914 and April 1945. The Story Behind two pistol shots: the single bullet, fired by a young Serb nationalist that triggered World War 1 and the self-administered shot that brought about the end of Adolf Hitler and World War 2.

4 April 1968 and February 1990. How two men - both intellectuals and determined opposers of racial oppression - came to symbolise the fight for equality as their lives for their cause.

17 July 1918 and 9 November 1989. The Murder of the Russian royal family marked Russia's irrevocable move from a monarchy to a Communist state. Seventy Years later, the fall of the Berlin Wall symbolised the collapse of the ideology.

26 November 1922 and 17 September 1822. Two days that brought ancient Egypt dramatically to life. In 1822, Jean-Francois champollion cracks Egyptian hieroglyphs. One hundred years later, Howard Carter reads the name on a tomb and makes an amazing discovery.