Between 4 and 8 October, a European delegation composed of representative of the European Commission and the SESAR Joint Undertaking (SJU) met with high officials of the Mexican government, Civil Aviation Authority, ATS service provider as well as several airlines and industries of the aeronautical sector. Objective of the visit was to agree on a memorandum of understanding to be signed by the European Commission and the Mexican Ministry of Communications and Transportation. This memorandum will aim at joint developments in the aviation field (especially AIRE and OPTIMI). On the European side the activities of this memorandum will be performed by the SJU. It is expected that it is signed before the end of this year and its concrete activities will be determined during an ATM workshop organised by Mexico in early 2011. The memorandum is part of the European strategy to enlarge the involvement of other regions of the world in SESAR. It follows the agreement reached with Brazil (early September) and the recent incorporation of the Japanese civil aviation world to the OPTIMI supervisory committee.