You make it sound so simple and convenient. We've been discussing UFO's/USO's and assassination theories, some of which go back decades and some even centuries. Their are historical leaders, like Tiberius on Capri, that we as historians still aren't sure how he died. Some say Caligula murdered him on his bed via Cassius Dip and Tacitus, but as a consensus, we simply don't know and never will. A few historians still think that Napoleon might've been slowly poisoned by British authorities on St. Helena to quicken his death.