publication date: Wednesday, July 17, 2019 (part of Summer 2019)

category: Disasters

clue: He was Apollo 11's backup commander in case of a problem, but he found a very famous problem himself as a commander two missions later.

explanation: Lovell was the commander of Apollo 13. The famous line "Houston, we have a problem" was actually said differently by someone else, but the film Apollo 13 cemented it in pop culture. more…

difficulty: easy

solved by: Russ Wilhelm, Steve West, LaVonne Lemler, Chris Lemler, Matthew Preston, Richard Slominsky, and Erik Bates

Apollo 11 Week: Few events have captured the imagination of the world like the first Moon landing on July 20, 1969. To celebrate the fiftieth anniversary of the historic event, here are seven people whose work made it possible.

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Gene Kranz

Failure wasn't an option for this mission control director on any of his Apollo missions, including 11 and 13. Go »

John F. Kennedy

The American space program kicked into high gear thanks to this president's belief that "this nation should commit itself to achieving the goal, before this decade is out, of landing a man on the Moon and returning him safely to the Earth." Go »

Michael Collins

He too made the voyage from the Earth to the Moon (except for the final descent), and designed the mission patch. Go »

Buzz Aldrin

He must have been buzzing with excitement when it was his turn to set foot on the Moon. Go »

Orville & Wilbur Wright

Without these two bicycling brothers, humans might never have left the surface of the Earth. In tribute, a chunk of wood from their greatest accomplishment was brought on board Apollo 11. Go »

Neil Armstrong

One small step for this man was also one giant leap for mankind. Go »