This article has been reviewed according to Science X's editorial process and policies . Editors have highlighted the following attributes while ensuring the content's credibility: The Boeing logo is displayed in El Segundo, Calif., on Jan. 25, 2011. Credit: AP Photo/Reed Saxon, File Boeing on Friday replaced the head of its troubled defense and space business, which has struggled with money-losing government contracts and embarrassing setbacks involving its Starliner space capsule. The company said Theo ...