 Complete the following phrase:  Alhassan has served on ad hoc basis in the following capacities; Chairman, President Cup Organizing Committee 2014; Chairman, Organizing Committee, National Youth Games 2013; Deputy chief of mission 2012 Summer Olympics, London; Chairman, 2012 Summer Olympics and 2012 Summer Paralympics Ministerial Advisory and Coordinating Committee 2012; Chief of mission, 2011 All-Africa Games 2011; Secretary, Presidential Inauguration Sub-Committee on Sports 2011; Member, Committee on the Structuring of the New National Sports Commission 2008; Member, Review Committee on the 2007 All-Africa Games; Chairman, National Seminar Committee on the 2007 All-Africa Games ; Secretary, LOC ANOCA Zone III Games  Abuja 2006; Member, Marketing Sub-Committee, Presidential Committee on 2003 All-Africa Games, Abuja; Secretary General, International Sports Camp in Havana, Cuba 2003; Member, Technical, Venue  Facilities Committee, 2002 African Womens Championship, Nigeria 2002; Assistant Contingent Secretary, 1999 All-Africa Games, Johannesburg; Chairman, TechnicalVenues Committee, Enugu Sub-Seat, 