'We have this expression in Russian: both is worse,’ she says. 'Which is worse – if he knew about it or didn’t know about it? Both is worse. All the evidence points to the fact that these explosions were organised by the FSB, and he was the head of the FSB until three to six weeks before the bombings began. If he wasn’t aware of them that’s damning; more likely, of course, he was. Certainly he would have been aware if it was carried out by the FSB after the fact; and certainly he would have personally made the decision not to investigate.’