http://www.slate.com/articles/video/video/2015/07/first_mars_image_mariner_4_anniversary_of_deep_space_photo_flyby_video.html

While astronomers and skywatchers around the world await data from the New Horizons flyby of Pluto, today also marks another historic moment for space exploration. Fifty years ago—from July 14 to July 15, 1965—the Mariner 4 spacecraft completed a successful flyby of Mars, sending back our first images another planet taken from deep space.