Ch4 Dispatches: America's Secret Killers (2011)

The strike that killed Osama bin Laden provided a glimpse of the vast and often secret campaign by US special forces and troops to kill thousands of Taliban and Al Qaeda fighters. They call it 'precision targeting'; their critics say it's assassination. A six-month investigation by Dispatches has gone inside the US 'kill/capture' programme to discover new evidence of the strategy's impact, and its costs. The team have talked to key figures in the US military, to US spies and to Taliban commanders and fighters.

A gripping, eye-opening investigation of Eritrea, one of the world's most secretive regimes, with shocking allegations of torture, detention and forced conscription

What's the environmental impact of the UK's huge soft drink habit? With a thirsty nation getting through two billion plastic bottles a year, and the same for cans, do Coke's recycling claims stand up?

What's the environmental impact of the UK's huge soft drink habit? With a thirsty nation getting through two billion plastic bottles a year, and the same for cans, do Coke's recycling claims stand up?

The full story of Boris Johnson's friendship with press baron Evgeny Lebedev and his dad Alexander, an ex-KGB spy, revealing the secret fears of security services.

An investigation by Dispatches exposes serious failings in the Home Office immigration system which allows wealthy foreign nationals to become British citizens in exchange for a £2m investment. Channel 4 Dispatches and The Sunday Times went undercover to hear how overseas tycoons can exploit the so-called golden visa system to buy the right to live in Britain even if they have links to the Russian President Vladimir Putin or provide critical components to the Chinese military.

One in three children in the UK is growing up inhaling unsafe levels of air pollution. Dispatches runs a world-first experiment to reduce hundreds of primary school children's exposure to toxic air. Reporter Morland Sanders reveals that it's not just exhausts that produce dangerous emissions, with previously unidentified toxins coming off every vehicle, even electric ones. Dispatches asks: is the government doing enough to protect our children's health? Is the motor industry to blame? And what can we do to prevent dangerous exposure to children now?