ScienceMillions head to Spain for a once-in-a-lifetime solar eclipse

A rare celestial spectacle is set to make parts of Spain the focus of worldwide astronomical attention. Millions are preparing to watch the eclipse, while authorities organize a major operation covering crowds, traffic and wildfire risks. Spain is bracing for as many as 6 million visitors, and viewing glasses have sold out amid growing eclipse excitement. The report looks at how the country is preparing for the big day and where spectators may find the best views.