We've put him in the wild, in the classroom, and this time, it's a test of endurance, physical ability, and dedication.
Andrew Keller takes to the pool and Lake Michigan to test against the men and women of Air Station Traverse City.
He suits up as an airman to test his swimming ability. He also goes through rescue swimmer training that only 10 percent of the swimmers pass. And in the finale, he suits up and attempts to save a stranded swimmer from the frigid Lake Michigan Waters.
Make sure to watch the video above.