The history of space travel has always been rife with conspiracy theories, and some suggest that Yuri Gagarin was not the first man in space. But he's the name in history books, and he’s the man whose achievement is celebrated every year with a world wide party, writes Alasdair Stuart.
Are you going to throw a party in Gagarin’s honour? Or do you think Chuck Yeager and Alan Shepard deserve their own international celebration? Who are your heroes of space travel?