On the 12th of May GAMMA joined the ECOSSIAN FP7 project in a dedicated meeting with their Advisory board. GAMMA and ECOSSIAN have joined forces in the recognition that both projects have come up with remarkably similar proposals for tacking the challenges of security at a European Level. While the objective of GAMMA is to develop security solutions relating to the ATM domain, the intention of ECOSSIAN is to improve the detection and management of highly sophisticated cyber security incidents and attacks against critical infrastructures. Both projects foresee multilayer solutions based on implementing a pan-European early warning and situational awareness framework. The two projects have already exchanged relevant information and GAMMA intends to involve key ECOSSIAN partners in the forthcoming validation activities. The meeting held in Dublin was an excellent opportunity to discuss and review the work done within ECOSSIAN and gather lessons applicable within the frame of the GAMMA activities.