Like the US and Britain, Germany is stockpiling vaccines against biological weapons, but the government is keeping mum about the specifics. Since three terrorist suspects were arrested on November 9 in London, the media there have been reporting that the men were preparing to carry out a nerve gas attack on the city's subway system. British officials have tried to reassure the public that no gas was found and that it is safe to ride the "Tube." Getting ready So far, officials in Berlin have had no reason to worry about possible attacks on that city's underground system. The government,...