Statue of Liberty National Monument national monument in 1924. In 1937, by proclamation 2250, President Franklin D. Roosevelt expanded the monument to include all of Bedloe's Island, and in 1956, an act of Congress officially renamed it Liberty Island. Ellis Island was made part of the Statue of Liberty National Monument by proclamation of President Lyndon Johnson in 1965. The United States historic district, a single listing on the U.S. National Register of Historic Places, was designated in 1966. The islands were closed during Hurricane Sandy in October 2012 and suffered severe damage. Liberty Island reopened July 4, 2013; Ellis Island re-opened October 24, 2013.
Statue of Liberty of the copper skin over decades, leaving two layers of coal tar, originally applied to plug leaks and prevent corrosion. Blasting with baking soda powder removed the tar without further damaging the copper. The restorers' work was hampered by the asbestos-based substance that Bartholdi had used—ineffectively, as inspections showed—to prevent galvanic corrosion. Workers within the statue had to wear protective gear, dubbed "moon suits", with self-contained breathing circuits. Larger holes in the copper skin were repaired, and new copper was added where necessary. The replacement skin was taken from a copper rooftop at Bell Labs, which had a patina that