Romanian designer Traian Vuia flies twelve meters outside Paris in a self-propelled airplane, taking off without the aid of tractors or cables, and thus becomes the first person to fly a self-propelled, heavier-than-air aircraft. Because his craft was not a glider, and did not need to be pulled, catapulted or otherwise assisted, it is considered by some historians to be the first true airplane.

Soviet cosmonaut Aleksei Leonov leaves his spacecraft the Voskhod 2 for twelve minutes. At the end of that time Leonov’s spacesuit had inflated in the vacuum of space to the point where he could not re-enter Voskhod’s airlock. He opened a valve to allow some of the suit’s pressure to bleed off, was barely able to get back inside the capsule, and in so doing became the first person to complete a spacewalk.

Off the coast of Spain in the Mediterranean, the deep submergence vehicle Alvin locates a missing American hydrogen bomb. The 1.45-megaton nuke had been lost by the U.S. Air Force during a midair accident over Palomares, Spain. It was found resting in nearly three-thousand feet of water and was raised intact on 7 April.

In Vietnam, American troops kill between 350 and 500 unarmed citizens, all of whom are civilians and a majority of whom are women, children, babies and elderly people. Many victims are sexually abused, beaten, tortured, and some of the bodies are mutilated. The incident doesn’t become public knowledge until 1969, but when it does, the American war effort is dealt one of its worst blows.

American sci-fi/horror author Howard Phillips Lovecraft dies of intestinal cancer in Providence, Rhode Island at age 46. Lovecraft died nearly destitute, but would become the most influential horror writer ever. His imaginary universe of malign gods and degenerate cults was influenced by his explicitly racist views, but his detailed and procedural style of writing, which usually pitted men of science or academia against indescribable monsters, remains as effective today as it was eighty years ago.

French pulp artist Michel Gourdon, who was the less famous brother of Alain Gourdon, aka Aslan, dies in Coudray, France aged eighty-five. He is known mainly for the covers he painted for the imprint Flueve Noir, but produced nearly 3,500 covers during his career.