I have been in Congo (Brazzaville) only for two days; I was working in DR Congo and visited a friend. In Kinshasa, you just have to cross the mighty river Congo. There are two types of boats: very old, large and slow for the poor, small fast speedboats for the rich. Goods go up and down the river as well, and handicapped are used to transfer them because they are exempt from tax. That is why you see people in wheelchairs with high stack of curious types of things stacked upon them; and blind men, being dragged by a person with one hand whilst the other hand is dragging big bags with merchandise.