Dear friends, Dear colleagues, Ladies and Gentlemen, Despite the irritation, frustration, and anger caused by a system failure and the temporary stoppage of all flights within the Athinai/Makedonia FIR for several hours on Sunday, 4 January 2026—an event that affected the entire network and particularly the South-East (SE) Axis—the usual professionalism demonstrated by air traffic controllers (ATCOs) in Greece and across the region must be commended. Their actions ensured, as