1976:The Viking I lander touched down at Chryse Planitia on Mars.1944:German military leaders attempted to assassinate Adolf Hitler in the July Plot.1917:The Corfu Declaration was issued, calling for the establishment of a unified Yugoslav state following World War I.1917:Prince Georgy Yevgenyevich Lvov resigned his post as prime minister of Russia's Provisional Government following the July Days demonstrations.1894:The Pullman Strike, a widespread railroad strike in the United States, ended, shortly after President Grover Cleveland ordered federal troops to Chicago.1877:The Siege of Pleven began in the Russo-Turkish War of 1877–78.1402:The forces of the Ottoman sultan Bayezid I were defeated by those of the Central Asian ruler Timur in the Battle of Ankara, resulting in the collapse of Bayezid's empire.

1969: First Moon landing.On this day at 4:18 [size=-1]PM, North American Eastern Daylight Time (EDT), the Eagle lunar landing module, carrying Neil Armstrong and Edwin (“Buzz”) Aldrin, touched down on the Moon near the southwestern edge of the Sea of Tranquillity (Mare Tranquillitatis)—the ultimate triumph for the U.S. National Aeronautics and Space Administration's (NASA) Apollo program. At 10:56 [size=-1]PM EDT, Armstrong stepped from the Eagle onto the Moon's dusty surface with the words, “That's one small step for [a] man, one giant leap for mankind.” Armstrong and Aldrin left the module for more than two hours and deployed scientific instruments, collected surface samples, and took numerous photographs.