WikiLeaks founder Julian Assange is making a last-ditch attempt to prevent his extradition to the United States to face criminal charges over espionage and the publication of classified information. WikiLeaks caused a diplomatic storm after it published a huge cache of secret military files in 2010 and 2011. Washington wants to try him for the leaks that it says damaged its national security. Here is what we know...

On March 7, 2014, a husky man in his late 30s with closely cropped hair addressed an uneven line of four dozen “volunteers”. Next to him were three men in body armour and green uniforms, with no insignia. The crowd of men, aged 20 to 50, were gathered outside a white Stalinist-era government building in Sevastopol, a port in Ukraine’s Crimea. They were uphill from the seashore, next...