(AP) — Astronaut Scott Kelly's identical twin pulled a fast one on NASA right before his brother blasted off on a one-year space station mission. NASA Administrator Charles Bolden told Kelly on Monday that he almost had a heart attack when his brother showed up launch morning without his usual mustache late last week. Mark, a former space shuttle commander, was still clean shaven as of Monday afternoon, as he chatted with Bolden about the unprecedented medical experiments planned on the twins over the coming year. President Barack Obama's science adviser, John Holdren, wished Kelly, Kornienko and the rest of the crew the best of luck and noted that the yearlong mission is an important milestone on the path to sending humans to Mars in the mid-2030s.