Half a century ago, cold war tensions nearly came to a head over a couple of sunspots. On May 23, 1967, the US Air Force was preparing its nuclear-armed aircraft for takeoff. The Soviet Union had jammed US surveillance radars, military officials believed, which was considered an act of war. But according to a new study ... scientists arrived just in time to defuse the situation: it was actually a solar storm, not a Soviet military operation, that jammed the radars. Earlier that month, researchers had noticed a large group of magnetically charged sunspots on the solar surface. These cool, dark sunspots are known to launch bursts of solar radiation, called solar flares, as well as plasma eruptions called coronal mass ejections (CMEs). On May 23, they recorded a solar flare so intense that it was visible by the naked eye. The same day, US military officials found that three of its Ballistic Missile Early Warning System radar sites appeared to be jammed. The Air Force prepared aircraft with nuclear weapons, ready to scramble in retaliation. Solar forecasters from the North American Aerospace Defense Command (NORAD) intervened in time to stop the launch. When convention and science don't offer satisfactory answers, we often turn to the fantastic. Last month, an unidentified blip was spotted in the corner of an International Space Station video feed. But just as the object approached Earth's atmosphere, the feed cut off, prompting that rumors NASA was covering up evidence of UFOs.