September 13

East Flevoland was part of the ambitious Zuiderzee Works, a project to reclaim land from the sea. The closing of the last dike gap marked the end of a multi-year effort of construction and pumping operations. Once drained, the polder provided fertile soil for agriculture and new settlements. The engineering feat showcased Dutch mastery of water management and civil engineering. Cities like Lelystad would later rise on the reclaimed land. This achievement exemplified human ingenuity in reshaping nature while securing safety and prosperity.

On September 13, 2001, the Federal Aviation Administration lifted its nationwide flight ban, allowing civilian aircraft to take to the skies once more. Major airlines resumed limited service at key airports under tight security and screening protocols. Passengers experienced heightened checks, including shoe removals and metal detectors. The resumption supported essential travel, cargo deliveries, and a step toward economic recovery. This milestone symbolized the nation's resilience and determination to restore normalcy. The aviation industry quickly adapted to permanent changes in airport security procedures.