FAR EAST CORRESPONDENT — Reaching an international consensus on banning landmines was a difficult road to travel. Along the way, it received a substantial boost from personalities like Diana, the late Princess of Wales, and the actress Angelina Jolie. But any deal was often held back by politicians, who were easily bullied by their militaries. But persistence and commonsense won out, and the Anti-Personnel Mine Ban Treaty was eventually signed 15 years ago.

Since then, though, doubts have arisen about its effectiveness.

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