Glen Cove, the only city located on Long Island's Gold Coast, has long been reinventing itself. After World War II, the farms and estates in the area gave way to suburban development. Modern advancements like the zoom lens, the dimmer switch, and X-ray technologies were all developed within the city limits, while factories on the creek supplied the world with carbon paper, typewriter ribbons, and graphic arts film and cameras. Albert Einstein, Nikita Khrushchev, and the Kennedy families stayed in the community, and stars of stage and screen performed about town. In 1968, Glen Cove celebrated its tricentennial. It was followed by urban renewal and the rebuilding of the old downtown. In the final years of the 20th century, the industrial era ended, and under the auspices of Mayor Thomas Suozzi, environmental cleanup and waterfront revitalization began.