Surely this needs to be backed up with international investment in the country, once you have removed gangs, you need to create better opportunities for people with high standards of education and high standards of employment, as in good wages, good training to make it more viable to stay in that employment.
A few years ago, the Taliban retook afghanistan, IIRC at the time there was a hurricane or something in Haiti, which from the Uk took a back seat on the news, clearly was not important enough to take most of the news time. This sort of thing needs to change so countries such as Haiti can thrive.
@zleap both these news events richly featured on the bbc world service - and as for Haiti there were international efforts to remove the gangs - as explained in the pod above