'There was no plan': The long road to Brexit

Tonight, at 11 p.m. local time, it finally happens: Brexit. It's been almost four years since Britain launched a referendum on whether to leave the European Union. To remember the highs and lows of how the U.K. got to this point, we're joined by the BBC World Service's political correspondent Rob Watson. He walks us through the big moments of Brexit, like the big red Brexit bus, the resignations of two prime ministers, and the stockpiling of food. Plus we look ahead to what might come next.