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The first modern asthma inhaler

Millions of people’s lives have been saved and improved by the metered dose inhaler.

• 9 mins

The Guatemalan syphilis scandal

How American doctors carried out secretive STD experiments in Guatemala in the 1940s

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The siege at Ruby Ridge

An 11-day standoff between a fugitive and the US government ended with three people dead.

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Margaret Ekpo - Nigeria's feminist pioneer

The trades union activist and politician who fought for Nigerian independence.

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America's first woman combat pilot

How Jeannie Leavitt became the first woman to fly a US Air Force fighter plane in 1993.

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Occupy Wall Street

How former policeman Ray Lewis joined the anti-inequality demonstrations in New York

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St Kilda

The remote Scottish islands whose last inhabitants were evacuated in August 1930

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Who has the right to vote in America?

The decision that quashed a key part of an electoral law designed to protect black voters

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Inventing James Bond

How author and former intelligence officer Ian Fleming created the British super-spy

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Flying through a volcano

How a British Airways jumbo jet flew through a volcanic ash cloud and survived

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The birth of the Sony Walkman

The portable tape player that brought music-on-the-move to millions was launched in 1979

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The Cape Town bombings

In the late 1990s there were more than 150 bomb attacks in the South African city

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Care in the Community

In the 1990s Britain closed down many of its long-stay hospitals and asylums

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The Dawson's Field hijacking

Barbara Mensch recalls how she was hijacked and held in Jordan in 1970

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Haiti's cholera outbreak

Haiti was cholera-free until UN peacekeepers brought it to the Caribbean country in 2010

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The birth of Reddit

In 2005 two young graduates created one of the internet's most popular websites.

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Banning alcohol in an Indian state

Punyavathi Sunkara recalls how the Indian state of Andhra Pradesh banned alcohol in 1995.

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Why the US rejected universal healthcare

After WW2 US President Harry Truman argued for healthcare for all but his plan failed.

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Resisting 'Europe's last dictator' in Belarus

Exiled dissident Nikolai Khalezin on the origins of the protest movement in Belarus

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The Mau Mau struggle against British rule

In the 1950s rebels took up arms to rid Kenya of colonial rule

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The Greensboro lunch counter sit-in

In 1960 four young black men began a protest against racial segregation in the USA.

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Tank Man

A photo of a man confronting a tank in China caught the world's imagination in 1989

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The mothers of Argentina's disappeared

The women who began protesting after their children were taken away by soldiers

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The Galileo project

A mission to study the planet Jupiter finally came to an end on 21st September 2003

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How Liberia wrote off its debts

Hoe Liberia negotiated to write off billions of dollars of debt.

• 8 mins

How Liberia wrote off its debts

How Liberia negotiated to write off billions of dollars of debt.

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When Nelson Mandela went to Detroit

Shortly after his release from prison the South African freedom fighter toured the USA

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Blackwater killed my son

How US private security guards opened fire on civilians in Baghdad, killing 17 people

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Bush v Gore: The 'hanging chads' US election of 2000

The US presidential election of 2000 was one of the closest and most contested in history

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The death of Gamal Abdel Nasser

The charismatic Egyptian president dominated Arab politics for almost two decades

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