![With Earth and one of the station's solar arrays as a backdrop, NASA astronaut Clayton Anderson works during the third spacewalk of the mission. Photo Credit: NASA](https://appel.nasa.gov/wp-content/uploads/2018/03/Justin-Smith.jpg)
My Best Mistake: Justin Smith’s “When ‘I Don’t Know’ Is the Right Answer”
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When I started working at NASA in 2007, I was on top of the world.
When I started working at NASA in 2007, I was on top of the world.
Luckily, it was a lesson learned during an exercise.