• Alexander Graham Bell transmitted the first wireless message from a photophone (a device that transmits sound on a beam of light).
• Ed White became the first American to walk in space
• Charles Richard Drew, an American physician and medical researcher who was instrumental in the preservation of blood plasma, was born.

Alexander Graham Bell Invented the Photophone June 3, 1880
Bell’s photophone
Medical Innovations: Charles Drew and Blood Banking
Today in Science – Jun 03