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First my student Jean-Charles de Menezes gets shot dead by British police after being wrongly suspected of being a suicide bomber. And now the Russians have silenced my other student Alexander Litvinenko (who told a colleague of mine that he was writing a book or had written a book about his life) by poisoning him.

Both deaths have been a big shock to the system but also the fact that if you’re a student of mine, statistically things aren’t looking too great.

Perhaps I should start setting extra homework to keep all my students at home.