SpaceX CEO Elon Musk's lawyers are advising him not to pursue higher security clearances. As the Wall Street Journal reports, that's because the mercurial entrepreneur could risk having to reveal his uent contacts with foreign nationals, most notably Russian president Vladimir Putin. Sources also told the newspaper that Musk's frequent drug use — which ranges from ketamine to psychedelic substances such as LSD — may be an issue if the CEO were to apply for an even higher security clearance. As a result, Musk isn't able to do some surprisingly basic things, unlike roughly 400 SpaceX employees who have […]