the 1964 New York World's Fair before moving to Disneyland in 1967; and Dumbo the Flying Elephant, which opened a month after the park. On November 20, 1964, Walt sold most of WED Enterprise to Walt Disney Productions for $3.75 million after being persuaded to by Roy, who thought Walt having his own company would cause legal problems. Walt formed a new company called Retlaw to handle his personnel business, primarily Disneyland Railroad and Disneyland Monorail. When the company started looking for a sponsor for the project, Walt renamed the City of Tomorrow Experimental Prototype Community of Tomorrow (EPCOT). Walt, who had been a heavy smoker since World War I, experienced deteriorating health; he visited St. Joseph Hospital on November 2, 1966, for tests. Doctors discovered a walnut-sized spot on his left lung and a few days later, they found the lung was cancerous and removed it. Walt was released from hospital after two weeks. He died on December 15, 1966, at the age of 65, of circulatory collapse caused by lung cancer. 1967–1984: Roy O. Disney's leadership and death, Walt Disney World, animation industry decline, and Touchstone Pictures In 1967, the last two films Walt had worked on were released; the animated film The Jungle Book, which was Disney's most successful film for the next two decades, and the live-action musical The Happiest Millionaire. After Walt's death, the company largely abandoned the animation industry but make several live-action films. Its animation staff declined from 500 to 125 employees, with the company only hiring 21 people from 1970 to 1977. Disney's first post-Walt animated film The Aristocats was released in 1970; according to Dave Kehr of Chicago Tribune, "the absence of his [Walt's] hand is evident". The following year, the anti-fascist musical Bedknobs and Broomsticks was released and won the Oscar for Best Special Visual Effects. At the time of Walt's death, Roy was ready to retire but wanted to keep Walt's legacy alive; he became the first CEO and chairman of the company. In May 1967, Roy had legislation passed by Florida's legislatures to grant Disney World its own quasi-government agency in an area called Reedy Creek Improvement District. Roy also changed Disney World's name to Walt Disney World to remind people it was Walt's dream. Over time, EPCOT became less of the City of Tomorrow and developed more into another amusement park. After 18 months of construction at