Colombia's capital city Bogota is the most dangerous city for women using public transportation, according to a new survey by the Thomson Reuters Foundation.<br /><br />It reveals more than half the women there have been verbally or physically harassed while travelling on buses.<br /><br />The city has deployed undercover police to tackle the problem but many say genuine improvement will require cultural change.<br /><br />Al Jazeera's Alessandro Rampietti reports.
