Is it ensure, insure, or assure?
A suspension bridge built between Manhattan and Brooklyn in the late nineteenth century; Manhattan and Brooklyn are today two boroughs of New York City. At the time of its completion, the Brooklyn Bridge was the world's longest suspension bridge.
Note: The Brooklyn Bridge is mentioned in several common expressions about the sale of the bridge by one person to another (the bridge is actually public property). A person who “could sell someone the Brooklyn Bridge” is persuasive; a person who “tries to sell the Brooklyn Bridge” is extremely dishonest; a person who “would buy the Brooklyn Bridge” is gullible.