A bomb attack on Moscow’s Domodedovo airport has killed dozens and injured many more. Although the precise details may not be known for some time, the attack represents a nasty development because it underscores an unpleasant truth. Security threats in Russia have become an international problem. The choice of target, Russia’s busiest international airport, seems calculated to cause maximum economic disruption and create high-stress political fall-out at home and abroad. News of the bombing immediately knocked 2 percent off Russia’s MICEX stock exchange and 4 percent off the share price of national airline Aeroflot. The experience of previous bomb attacks suggests that the impact on financial markets will be temporary. Such incidents are, sadly, not new in Russia. It is less than a year since 40 people were killed in twin bombings on the Moscow metro, and previous years have seen many such attacks on civilians in Moscow and other Russian regions. As with these other atrocities, s...