And joins us from on board the hornet. Reporter the festivities are just about to begin here on the uss hornet. A lot of these people have not talked about 50 years it turns out it takes a whole village to pull this off and get those astronauts to the moon its estimated at 400,000 people worked all across the country on the apollo 11 mission. Some of them right here in the bay area. To understand why nasa chose to touch down on this particular spot on the moon in a place known as the sea of tranquility and why it designed the lunar lander the way that it did, we have to go deep deep into the bowels of the nasa Research Center in Mountain View and into one of the worlds premier hyper velocity impact testing sites. Welcome to the ranger. Reporter charles is the facility manager and explains the device built in 1966 is basically a gun range on steroids. We use this gun to shoot at targets and a blue chamber. A very high speeds to simulate what happens when meteors and asteroids impact a p