By far the largest conservation unit is the 1140-square-mile Big Cypress National Preserve. It was created in 1974, the result of a battle that united a broad spectrum of advocates against landowners pushing for various forms of land development. The catalyst was a 1960s plan by the Dade County Aviation Department to build an “Everglades Jetport” on 39 square miles of wetlands in the eastern Big Cypress. It was to be a reliever airport for Miami International and serve other South Florida population centers with new superhighways and high-speed rail. To avoid rising costs, the aviation department had been secretly purchasing the land for the project. After its public disclosure, I attended a presentation of the plan and heard the director of the aviation department respond to a question about environmental protection with, “Don’t worry, we’ll set aside some land for you guys with the butterfly nets.” I was not alone in my angry reaction to the callous disregard for the superlative wilderness and natural values of the Big Cypress Swamp and neighboring Everglades. The jetport project aligned former adversaries, including hunters, non-hunting conservationists, and the Miccosukee Indians. Under the influence of the Assistant Secretary of the U.S. Department of the Interior, Nathaniel Reed, President Nixon’s domestic advisor, John Ehrlichman, Florida’s governor, Reubin Askew, and a key conservationist, Joe Browder, a powerful resistance coalesced, stopping the jetport and protecting the Big Cypress Swamp. The Everglades Coalition, as well as Marjory Stoneman Douglas’ Friends of the Everglades, formed out of this controversy. Prior to being stopped, a single jetport runway had been completed in 1970. Now called the Dade–Collier Training and Transition Airport, on the eastern side of the Big Cypress National Preserve north of the Tamiami Trail. With restricted ground access, the runway is used for aircraft training.