1/5 On October 1, 2017, a gunman on the 32nd floor of the Mandalay Bay Resort and Casino in Las Vegas opened fire on a crowd attending a country music festival outside, killing 58 people and injuring hundreds of others. File Photo by James Atoa/UPI | License Photo Oct. 1 (UPI) -- On this date in history: In 1890, legislation is signed by President Benjamin Harrison creating Yosemite National Park, making it the nation's third National Park. Advertisement In 1903, the first World Series opened in Boston. It was a best-of-nine competition, won by the Boston Pilgrims of the American...