AUSTIN, Texas, Dec. 22 -- The University of Texas issued the following news release: Hans Mark, a world-renowned aerospace engineer who was in Mission Control during the first moon landing and who served as chancellor of the University of Texas System for nearly a decade, died on Saturday, Dec. 18 at the age of 92. Mark leaves a legacy of exploration and discovery, warmth and inspiration, and leadership and innovation. In addition to being a champion of research and technology, he was known for more PR