This video is a few years old, but if you aren't familiar with world geography, you should probably pay attention to what is making other countries succeed or fail. This is one example of a place that once was succeeding but for several years now, has been on a hellish downward spiral.
Just throwing money at the problem won't improve the situation though. Only changing the leadership of the area and the surrounding areas to people who honestly want prosperity and opportunities for the general population and improving the health and safety measures for the law abiding citizens can bring about an improvement.
As tempting as it might be to blame the "wealthy white" nations for this kind of poverty, it's best to keep in mind that if the leaders of cities like this actually cared about their people and weren't greedy, corrupt and selfish, the city would be flourishing and self-sustaining without any unsolicited outside support.