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I'm John Batchel with Eric Berger, the senior staff writer at Ars Technica. Most importantly,

the author of the new book, Reentry,

SpaceX, Elon Musk, and the reusable rockets that launched a second space age.

This is Volume 2 in Eric's chronicling of the trip to Mars.

To anticipate, in the first book, we got to the launch from Quadolin Island. It's an elaborate

story, but on the fourth try, rolling the dice with the last of the money, they satisfy the

demands of NASA and launch into orbit Falcon 1, one engine, the Merlin engine, older version.

Now we're going to go to Musk's idea, which is nine Merlins in a booster.

And in the summer of 2009, there's a whole crew of young people who enjoy partying and the demands of a Texas summer with crickets and rattlesnakes

and heat and squalls and they are getting ready for the first stage to go to Florida.

What is it that they have to do that summer to prepare the first stage how are they working this

eric well they have they have kind of the the first stage the booster they have the engines but

there's so much more that goes into a rocket than just kind of the outward appearance right you've got

all of the guts in it, the computers,

the flight computers that help the vehicle fly, because once a rocket launches, no one is controlling

the flight of that rocket. It's making all of the calculations on its own. You've got to wire up

all of the plumbing to get the propellant from the liquid oxygen and liquid hydrase, or excuse me,

...