In this May 13, 2009 photo, Dr. Georg von Tiesenhausen, center, is hugged by his son, Dr. Georg von Tiesenhausen Jr., during a surprise birthday celebration at the U.S. Space & Rocket Center in Huntsville, Ala. The senior von Tiesenhausen ... more > By - Associated Press - Tuesday, June 5, 2018 Click to Read More and View Comments Click to Hide