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Guinea's president vows to tackle corruption. Channel 4 News investigates if he has made progress.

Jonathan Miller has won four Royal Television Society awards and four Amnesty International TV News awards for the programme.
Before joining ITN in 2003, Jonathan worked as a documentary director and presenter after four years as a BBC correspondent in south east Asia.
For decades, corrupt dictators in Guinea have sold off its mineral wealth for plunder. But now the west African state has a president who says he wants to end all that.
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Guinea's president vows to tackle corruption. Channel 4 News investigates if he has made progress.
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Jonathan Miller's powerful images describe the challenges facing the west African state of Guinea as it struggles to exploit its reserves of bauxite, copper, gold, diamonds and iron ore.
With diplomatic moves to end Syria's conflict locked in paralysis, there is a very real danger the country's huge chemical weapons stockpile could either be used or fall into the hands of jihadists.
#Syria chemical weapons: the threat: http://t.co/zRXtLrqNRw #c4news
— millerC4 (@millerC4) 18 May 2013
Will Syria's huge chemical weapons stockpile be used by the regime against its own people? Will it be transferred to Lebanon for use against Israel? Or could it fall into the hands of jihadists?
Human rights groups react with disgust to David Cameron's decision to attend the Commonwealth summit in Sri Lanka this November, as our Foreign Affairs Correspondent Jonathan Miller reports.
As Malaysia counts down to its general election, corruption still looms large. Our foreign affairs correspondent, Jonathan Miller, reports on one scandal that has horrified electorates.
#SriLanka High Commissioner wouldn't even respond to #C4News when asked to comment. Why is this nasty regime even allowed to host #CHOGM?
— millerC4 (@millerC4) 30 April 2013
Amnesty International says Sri Lanka should not host November's Commonwealth heads of government meeting unless it stops "systematic violation of human rights".
Jonathan Miller, our top Foreign Affairs Correspondent, offers his perspective on original and striking stories from across the world.
The Canadian foreign minister tells Channel 4 News he is "appalled" the Commonwealth heads of government meeting will still take place in Sri Lanka despite concerns over human rights in the country.
A must-watch report... Immigration Nation: Nigel Farage's Bulgaria trip with @jrug - VIDEO: http://t.co/5Ev5tpSmqn #c4news
— millerC4 (@millerC4) 23 April 2013
The US Senate votes for a debate on reforming gun laws following Sandy Hook. The vote means plans for background checks will now be considered by Congress in the coming weeks. Jonathan Miller reports.
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Syria's Kurds say they are fighting for their homeland, in the city of Ras al-Ayn they have clashed with rebels. This report was filmed by French photojournalist Mani and reported by Jonathan Miller.
Amid growing alarm over the muzzling of the media in Sri Lanka, its state broadcaster has denied censorship in a row that has seen the suspension of BBC World Service broadcasts.
Appearing for the first time at the ICC, renegade Congolese General Bosco Ntaganda was informed of the breathtaking array of charges against him, writes Foreign Affairs Correspondent Jonathan Miller.
Syria's descent: the agony of Aleppo's children - http://t.co/RuUWiybKFW - gut-wrenching reportage on #c4news
— millerC4 (@millerC4) 25 March 2013
Weekend Blog Rec: @nzerem's thoughtful and very personal tribute to Chinua Achebe... and Marley: http://t.co/ttFym7N9fZ #c4news Wow, Keme.
— millerC4 (@millerC4) 23 March 2013
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Pope Francis is chosen as the new head of the Catholic church - watch Jonathan Miller's report.