Now, government officials are dialing up the pressure on Boeing to speed up development of the long-overdue rocket, called Space Launch System or SLS. The space agency contracted Boeing in 2012 to build SLS's core components. Bridenstine's remarks came after US Vice President Mike Pence said Tuesday at a National Space Council meeting in Alabama that news of more hangups with the SLS program were a "great disappointment," and the current timeline is "just not good enough." Boeing began building SLS's core stage, the backbone of the rocket, about seven years ago. Officials said at the time that SLS would...