A NASA astronaut on board the International Space Station tweeted a picture Saturday from orbit of a 'Vulcan' hand salute as a tribute to actor Leonard Nimoy, known best for his 'Star Trek' role as 'Mr. Spock.' Nimoy, who died Friday at 83, of end-stage chronic obstructive pulmonary disease at his Los Angeles home, with family at his side, said his son, Adam Nimoy. His final public statement, last Sunday on Twitter, was thoughtful and bittersweet. "A life is like a garden. Perfect moments can be had, but not preserved, except in memory," he wrote, followed by his customary "LLAP"...