The latest stories from the World section of the BBC News web site.
Updated: 2 hours 50 min ago
Is it always necessary to prosecute decades-old crimes?
The African migrants who made a Sicilian palace their home
Musician questions sex education in Iceland
Australia and New Zealand prepare for ceremonies in Turkey in honour of soldiers who fought at Gallipoli 100 years ago.
Liberal Democrat leader Nick Clegg says he would not join a government dependent on "life support" from the SNP after the general election.
The plan to get aid to Syria in a swarm of drones
Three members of the British Army's Brigade of Gurkhas spoke to BBC News about why they want climb Everest.
UKIP leader Nigel Farage admits to being "in a great deal of pain" at the start of the general election campaign.
Lewis Hamilton is the richest sportsman in Britain with earnings of £88m, as Wayne Rooney moves into second on £72m.
Nasa astronaut Chris Hadfield talks about using social media in space, including recording "Space Oddity" and taking photos at 8kms a second
Yemen's former president calls on his Houthi rebel allies to withdraw from territory they have seized in return for a halt to Saudi air strikes.
California doctors have removed what they call an embryologic twin living deep inside the brain of a student who had health problems.
England are frustrated by Kraigg Brathwaite's composed century as West Indies have the better of the fourth day of the second Test.
A Canadian court grants bail to a former Guantanamo Bay detainee Omar Khadr until he completes his appeal against his US conviction.
A leading Pakistani activist is shot dead, and her mother left seriously injured, after leaving a seminar on torture in Karachi.
The Nasdaq and S&P 500 close at new record highs after US tech firms report strong first quarter profits.
Japanese defending champion Kei Nishikori and Spanish third seed David Ferrer win through to the Barcelona Open semi-finals.
Islamic State appears to have released a promotional video for its own health service featuring NHS-style branding and an Australian doctor.
Louis van Gaal believes Ryan Giggs will succeed him as Manchester United manager when he eventually leaves the post.
Officials in the Swiss mountain resort Zermatt say they are ending the practice of allowing tourists to pose for photos with the iconic St Bernard dogs.