On December 21st, 1968, three men left earth and became the first humans to orbit the moon. Their entire journey was legendary, and even 45 years later watching Apollo 8 launch is almost heart-stopping.
Commander Frank Borman, Command Module Pilot James Lovell, and Lunar Module Pilot William Anders were the first men to leave our planet's orbit. They were the first to view the full earth, and the first to lay eyes on the far side of the moon. Their mission was the first manned flight of the immensely powerful Saturn V rocket, and a late-in-the-game mission change pushed the launch date from spring of 1969 to December 1968, robbing them of three months of training.