Stephen Sackur is in Zimbabwe. For so many years, this country was defined by Robert Mugabe and the independence struggle. When Zimbabwe's military pushed Robert Mugabe out of power two years ago, there was hope of an end to the era of misrule and corruption. Arguably, things are worse. Amid a currency crisis, fuel imports have been cut; no jobs and soaring inflation is a recipe for wholesale desperation, as millions of Zimbabweans go to bed hungry, dependent on hand-outs for survival. This country is on the brink of catastrophe - who or what will save it?