The world is so small up here. The towns, rivers and mountains pass by. They look all the same. It is as you would click on miniature mode on your camera. But this is real, so real. Lavenir, a 27 years-old Cameroonian, has chosen a window seat so that his eyes follow the changing patterns of vegetation on his flight from Germany to Cameroon. Right now, the slim young adult simply let a frail smile pass his lips. For the first time, he returns to his home country since he left in 2015 to study his Master degree, like a…