Inside the UAE's secret Sudan war operation at Somalia's Bosaso

At Bosaso Airport in Somalia’s Puntland state, the thunderous sound of large aircraft hitting the tarmac echoes out across the port city. 

Minutes after landing, the aircraft can be identified. It is a white IL-76 heavy cargo transport plane, and it is parking next to a very similar aircraft. 

For local residents, the sound of such planes was unusual two years ago, when they first began landing in Bosaso. Not anymore. Moments later, undisclosed heavy logistical materials are seen being offloaded from the aircraft.