Colombians are heading to the polls on Sunday to vote for a new president.
For the first time in its history, a leftist could become president.
Polls are showing rebel-turned-politician Gustavo Petro as the clear frontrunner.
He has pledged to create considerable change in Colombia – which has brought hope to younger voters. 
Al Jazeera’s Alessandro Rampietti reports from the capital, Bogota.
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