Chicago’s Meigs Field airport was abruptly and controversially closed in 2003 after the city carved six large X’s into the runway, effectively grounding sixteen planes. Officials justified the closure citing heightened security concerns in the wake of the 9/11 terrorist attacks. The drastic action sparked public outrage and legal battles, but ultimately stood. Over the subsequent twelve years, the airfield underwent a remarkable transformation. Instead of rebuilding, the city chose to restore the land to its natural state, creating a 40-acre parkland. The former airport is now a flourishing landscape boasting prairie, wetlands, and vital habitat for migratory birds, showcasing an unusual example of urban environmental renewal.