Unknown facts about Gustavo Petro.

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Petro embraced leftist politics as a teenager after the 1973 coup d'etat in Chile that unseated Marxist president Salvador Allende.

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He joined the M-19 urban guerrilla group as a 17-year-old.

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His role in Colombia's decades of civil war was as an organizer, never a fighter.

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Petro was captured by the military in 1985.

He claimed to have been tortured before spending almost two years in jail on arms charges.

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Petro was mayor of Bogota from 2012 to 2015

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Petro also garnered much criticism as mayor for a chaotic plan to nationalize rubbish collection.

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