From FLY-theBook.com

Apollo 11

50 years ago today, as Apollo 11 completed its Trans Lunar Injection burn to accelerate and position into a Free Return Trajectory on the way to the moon, it’s worth remembering how long and fragile the early chain of the Mercury, Gemini and Apollo operations were and how, if the culture had not changed at NASA, the mission to put a man on the moon by the end of that decade, would have failed……

Click here to read the full story.