Why is Africa poor? Dateline Yekepa, northern Liberia 2

This is Mark Doyle’s second post from northern Liberia
I’ve just had huge fun riding on a pickup truck which miraculously turned into a tiny railway train. The pickup drove towards the railway. Then, by some miracle of engineering, the road tyres were lifted and a set of railway wheels hidden under the chassis were lowered onto the tracks. Then we drove along the rails!