最近，一架警方的直升机在里约热内卢被击落，这使所有的焦点都聚集在了巴西与其邻国16000公里的陆地边界上诸如佩德罗·胡安·卡瓦列罗这样的小镇上。

The recent shooting down of a police helicopter in Rio DE Janeiro has cast the spotlight on to places such as Pedro Juan Caballero, along 16, 000km of "dry border" between Brazil and its neighbours.

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