Today in History: October 1: In 1890, Yosemite National Park was designated; In 1903, the first modern baseball World Series began; In 1908, Henry Ford introduced his Model T; In 1949, Mao Zedong proclaimed the People’s Republic of China; In 1971, Walt Disney World opened near Orlando, Florida; In 2017, the deadliest mass shooting in modern U.S. history took place in Las Vegas