How a decrypted telegram pushed America into World War One, while prompting the construction of a permanent fence between the US and Mexico. BBC Mundo's Luis Fajardo travels to the border, a permanent symbol of distrust and fear. Show less
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How a decrypted telegram pushed America into World War One, while prompting the construction of a permanent fence between the US and Mexico. BBC Mundo's Luis Fajardo travels to the border, a permanent symbol of distrust and fear. Show less