In the brink of extinction, bald eagle populations in the United States faced habitat destruction, direct shooting, and pesticide use during the mid-20th century. The most lethal threat was DDT, a persistent chemical pesticide that affected calcium processing in adult eagles, leading to fragile eggshells. By 1976, only one breeding pair remained in New York near Rushford Lake. A team of wildlife biologists, led by Peter Nye, devised an innovative plan called "hacking" to raise healthy young eagle chicks on artificial towers in New York and release them into the wild. Starting from a single hacking tower built in 1976 at Montezuma National Wildlife Refuge, the project expanded over the years, releasing 198 nestling bald eagles across four sites in New York. The technique proved successful when a pair of released eagles built a nest near Watertown and successfully fledged two chicks in 1980, marking a significant milestone in wildlife conservation. By 1989, the project achieved its goal of establishing 10 breeding pairs in New York, with the population growing dramatically over the years, reaching more than 400 breeding pairs by 2024. The hacking methods pioneered by Peter Nye and his team have influenced similar eagle reintroduction initiatives across North America.