One of the buses embarks on the tour from Ayotzinapa
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Mexico missing students: Parents begin protest bus tour

The parents of 43 Mexican students who went missing seven weeks ago have begun a bus tour across the country in protest against the government's handling of the investigation.

Hundreds of people joined the relatives in south-western Guerrero state in a street demonstration at the start of the tour.

Alpa Patel reports.

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