4/20/72: Date NASA’s Apollo 16 landed safely on the moon

212: Pounds of moon rock the mission returned to Earth

2: Number of astronauts aboard the lunar module, Orion

7: Number of hours the mission was in crisis before being salvaged

1: Number of astronauts aboard the Apollo 16 (Thomas Mattingly) removed at the last minute from the failed Apollo 13 mission

Source: bbc.co.uk