Ugandan police officers wave as they prepare to board a United Nations aircraft at Aden Abdulle International Airport in the Somali capital Mogadishu 27 July 2013, having completed their one-year tour serving as formed police units with the African Union Mission in Somalia (AMISOM). The outgoing 135 police officers were replaced by a unit of the same number that arrived from Uganda today to begin their own 12-month long deployment serving with the AU mission in the Horn of Africa nation. AU-UN IST PHOTO / STUART PRICE.