Oct. 26 (UPI) -- NASA Administrator Bill Nelson says reported secret conversations held between SpaceX CEO Elon Musk and Russian President Vladimir Putin are "concerning" and, if true, should be investigated. Speaking Friday an event hosted by the online news site Semafor, Nelson was asked about this week's story in the Wall Street Journal , which reported that Musk and Putin have been holding secret conversations on personal, political and business matters since 2022, even as Russia is