With the latest remote tower operation trials conducted in Sweden in May 2012, the concept is one step closer to realisation. During three weeks, 14 European air traffic controllers validated two technical configurations that allowed them to observe the traffic and controller decisions taken in a tower 100 km away. Göran Lindqvist and Thomas Svensson from LFV explain what happened during the operational validation which was organized in the framework of SESAR’s second Release programme.