Sam Rainsy: Has Hun Sen totally outfoxed his opponents?

Stephen Sackur speaks to exiled Cambodian opposition leader Sam Rainsy. He has tried and failed to engineer the downfall of Cambodian ruler Hun Sen for decades. Now Hun Sen’s son is taking over. Few in Cambodia expect anything significant to change, including the relative impotence of the opposition. Has Sam Rainsy been comprehensively outmanoeuvred?