Random numbers less random around world events?

This one intrigues me: a study shows that random number generators become less random around major global events (9/11, Tsunami). Its one of those statistical correlations that's hard to explain or refute, though it harkens back to mundane explanations for remote viewing experiments, the Bible Code, Father Ernetti's Chronovisor and Asimov's psychohistory.

via Minding the Planet