Gagarin: The truth?
THE death of the first man in space, Russian Yuri Gagarin, may have been solved after more than 40 years of claims that he was drunk or was assassinated.
Investigators believe he died on a training flight because he discovered an air vent was open in his Mig-15 fighter jet at 10,000ft.
Gagarin, 34, and his co-pilot made an emergency dive but they blacked out. Both died when the jet crashed into a forest in 1968.
Igor Kuznetsov, a retired Soviet air force colonel, believes a careless pilot who used the same plane may have been to blame for the open vent.