HOUSTON, Texas -- NASA is celebrating its 50th anniversary of the Moon Landing this Saturday, and they're taking a look back at that historic day in 1969. NASA's history office shared some very special moments of the July 20 moon landing on Twitter.

The world had watched, spellbound, as Apollo 11 made mankind’s first landing on the moon in July 1969. Fewer people paid attention when NASA sent its second mission to the moon four months later: Apollo 12, which landed on Nov. 19, 1969 — 55 years ago ...