In 1964, author Ken Kesey led a group of friends on a psychedelic road trip across the USA
Chinese leader Mao Zedong died on 9 September 1976. Sidney Rittenberg knew him well.
The murder of 35 people by one gunman led to sweeping changes in Australia's gun laws.
Harry Wu was a young student jailed for nearly 20 years in Communist China.
In April 2004, the murder of a young student provoked a wave of protests in Argentina.
Steve Biko led South Africa's Black Consciousness Movement before he was killed in 1977.
On 13 July 1954, celebrated Mexican artist Frida Kahlo died at the age of 47.
In July 1944 a group of German officers attempted to assassinate Adolf Hitler.
In April 1979, the brutal Ugandan ruler Idi Amin was ousted by invading Tanzanian troops.
In April 1967, seven years of military dictatorship began in Greece.