Ninety per cent of cocaine reaching the United States comes from Colombia - most of it via Farc rebels, a senior US official has told a magazine. The Drugs Enforcement Agency's Michael Braun described the Farc as "half terrorists, half traffickers - the face of global crime in the 21st Century". The left-wing guerrilla army is thought to be one of the world's most powerful. Colombia's right-wing paramilitaries - players in the country's civil conflict - are also involved in the drug trade. Under what is known as Plan Colombia, the US has given $3bn in mainly military aid to...