August 16 - Joseph Kittinger parachutes from a balloon over New Mexico at 102,800 feet (31,333 m). He sets unbeaten (as of 2003) world records for: high-altitude jump; free-fall by falling 16 miles (25.7 km) before opening his parachute; and fastest speed by a human without motorized assistance, 982 km/h (614 mi/h).
August 19 - Sputnik program: The Soviet Union launches Sputnik 5 with the dogs Belka and Strelka (Russian for "Squirrel" and "Little Arrow"), 40 mice, 2 rats and a variety of plants. The spacecraft will return to earth the next day and all animals will be recovered safely.
September 1 - Disgruntled railroad workers effectively halt operations of the Pennsylvania Railroad, marking the first shutdown in the history of the company (event lasted 2 days).