New Jersey population doubled and manufacturing became a four billion dollar industry between 1900 and 1930. In the 1930's the Great Depression hit New Jersey hard bringing massive unemployment. After World War II in the 1940's, the state rebounded in electronics and chemical industries. People who lived in the overcrowded cities started moving back to the rural areas. Many transportation projects helped better connect New Jersey. The Garden State Parkway and the New Jersey Turnpike opened in the 1950's. Air travel has close ties to New Jersey. The first passenger flight in American history was flown from New York to Atlantic City on May 3, 1919. Now New Jersey is home to two international airports, Atlantic City and Newark. In 1963, Newark airport expanded it’s passenger and cargo services. Newark became one of the worlds busiest airports in the 1980's. New Jersey is recognized for it’s present as well as the past, and will continue to be the setting for many great events in the future.