10 Missing in US Naval Collision

The US navy says a search and rescue operation is taking place off the coast of Singapore, after one of its ships collided with an oil tanker near the Strait of Malacca. The USS John McCain - a guided missile destroyer - was damaged in the incident.

Africa's population is expected to double by 2050 - to two and a half billion people. What will be the impact in Nigeria, set to become the world’s third most populous country in the next 30 years?

A group of more than a hundred specialists are calling on the United Nations to ban the development and use of killer robots. They've written a letter which is being launched at the opening of the International Joint Conference on Artificial Intelligence in Melbourne today. They warn that "Once developed, lethal autonomous weapons will permit armed conflict to be fought at a scale greater than ever, and at timescales faster than humans can comprehend.