Twitter’s act of adding fact-checking labels to a couple of presidential tweets set off a storm in the social-media world — almost at the same time real-life stormy weather caused officials to scrub the NASA-SpaceX launch to the International Space Station, the first on an United States rocket since 2011. El Kaiser and J.D. discuss it all ahead of America’s rescheduled return to space this weekend. Blast off with PTJ 338!