Why do young people join violent causes?

On the morning of September 24 2014, 15-year-old Yusra Hussien left for school near her home in Easton, Bristol. She then disappeared. News reports surfaced a few days later that Yusra and a 17-year-old friend from London ...

Ban 'killer robots,' rights group urges

Hollywood-style robots able to shoot people without permission from their human handlers are a real possibility and must be banned before governments start deploying them, campaigners warned Monday.