A nationwide air traffic communications failure threw Greece’s skies into chaos on Sunday, forcing the suspension of nearly all flights after a critical radio frequency malfunction crippled the Athens Flight Information Region (FIR). The Hellenic Civil Aviation Authority (HCAA) confirmed that a major circuit failure struck the nation’s air traffic control network around 9 a.m. local time, paralyzing communications for airports across Athens, Thessaloniki, and other major hubs. Stranded travelers flooded terminals as takeoffs were halted nationwide and arrivals diverted to neighboring countries. Watch for details