Third crewed mission to the lunar surface.
Shepard was the oldest person to walk on the moon (47 years old).
The command module was named "Kitty Hawk" after the town in North Carolina where the Wright brothers made the first powered flight.
The lunar module was named "Antares" for the star it used to orient itself for lunar landing.
Except for the 15-minute suborbital flight which made Alan Shepard (above) the first American in space, this was the first spaceflight for each of the astronauts.