Ugandan journalists say their right to protect the identity of their sources is under siege, as police halt work at a number of newspapers and radio stations, demanding the release of a controversial letter.  

The southern city of Karachi is one of the most dangerous cities in the world. For two decades a liberal party has had control over the Pakistani city, but now it seems the party is losing its grip on the city. 

Increasingly, drones and robots are being used in combat to replace soldiers in high-risk situations. Some researchers and politicians are concerned that, in future, autonomous machines may reign over life and death.