8 Sep 2014:
Giant black armoured vehicles, assault rifles, gas masks and drones: the modern face of policing in America is on display at a four-day police trade show in Oakland, held mere weeks after a fatal police shooting in Ferguson, Missouri
We look back at Apple's tech products, including game-changers such as the iMac and iPhone, curiosities like Lisa – and duds, like the 20th Anniversary Macintosh