"This is the greatest challenge that the industry has ever faced," Phil Hettema, founder of The Hettema Group in California, a theme park ride designer told Reuters. There are six Disney resorts in California, Florida, Tokyo, Paris, Hong Kong and China with one dozen parks including Walt DisneyWorld Resort in Florida, Magic Kingdom, Hollywood Studios, Epcot and Animal Kingdom. Disney, which makes a third of its revenue from parks and products, began the shutdowns on March 12. Dubbed "the happiest place on earth," a Disney park closing is almost unheard of. Only natural disasters or a national tragedy such as President John F. Kennedy's death and 9/11 or the Lunar New Year China have shuttered the parks The news service reported Robert Allen Iger, executive chairman of the The Walt Disney Company, recently said checking guests' temperature could become routine at Disney park entrances when they reopen.