On 22 July 1946, a Zionist group Irgun, bombed the King David Hotel in Jerusalem, British Mandate of Palestine, killing 91 people.

On 11 September 2001, international Islamist group Al-Qaeda hijacked four passenger planes, and deliberately flew two of them into the World Trade Center, one into The Pentagon, and crashed the other in a field in Pennsylvania, killing 2,998 people.

A brief history of Irish Republican terrorism.

Palestinian terrorism, including events in Munich, in September 1972, when militant group Black September kidnapped and murdered 11 Israeli sportspeople.

The hijacking of three passenger planes, in September 1970, by the PLO, accompanied by demands for the release of imprisoned Palestinians.

The murder of Luis Carrero Blanco. On 20 December 1973, the Prime Minister of Spain was assassinated with a car bomb, by communist group ETA.

Formed in 1970, the Brigate Rosse (Red Brigades) sought to create a revolutionary state through armed struggle and to separate Italy from the Western Alliance (NATO). The Red Brigades’ main aim was the overthrow of the Italian government, the weakening of NATO and the creation of a Marxist state.

Terrorist acts committed by far-left group Baader Meinhof Gang / Red Army Faction in Germany in the 1970s and 1980s.

EOKA's attacks on police stations, government offices and military installations on Cyprus in the 1950s.

The history of Egyptian terrorism, including the 17 November 1997, murder of 59 foreign tourists, three police officers and a tour guide by Egyptian group al-Gama'a al-Islamiyya.

On 21 December 1988, Libya bombed transatlantic Pan Am flight 103 over the small Scottish town of Lockerbie.

The group OAS committed a series of attacks, killing hundreds, in an attempt to keep Algeria governed by France.

In 1974, left-wing group the Symbionese Liberation Army kidnapped heiress Patty Hearst, exerting pressure on her to make them join in their violent activities.

Communist group The Weathermen carried out a series of bombings in the United States from 1969 - 1977.

On 19 April 1995, Timothy McVeigh bombed the Alfred P. Murrah Federal Building in Oklahoma City, killing 168 people.

A history of attacks carried out by white, right-wing Christian group KKK.

The motives behind the March 15, 2005 gas attacks on the Tokyo subway system, committed by the new religious group Aum Shinrikyo - who aimed to destabilise the Japanese government.

The motives behind actions taken by the Mahdi Army, who rose to arms in Iraq after the deposition of Saddam Hussein, in reaction to the US Military banning a Shia newspaper

The motives, morals and methods of Che Guevara who in his relatively short life managed to inspire a generation of Cuban youths into rebellion against authority.

The story behind the Cuban Missile Crisis in 1962, which saw Cuban revolutionary Fidel Castro and Soviet premier Nikita Khrushchev bring the world to the brink of nuclear war.

America's disastrous attempt to capture two notorious Somali terrorists in 1993. Last in the series.

The global war against the Taliban, who instigated a brutal authoritarian regime in Afghanistan.

The violent campaign of the Sri Lankan terrorist group the Tamil Tigers, which started in the 1980s and has resulted in the deaths of almost 60,000 people.