Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. John Elmer Blaha (born August 26, 1942, in San Antonio, Texas) is an engineer, retired United States Air Force Colonel and a former NASA astronaut. He is a veteran of six Space Shuttle missions and a stay on the Mir space station. Married to the former Brenda I. Walters of St. Louis, Missouri, they have three grown children and two grandchildren.

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