Common sense says it would be madness for a group of Chechens to smuggle explosives all the way from Urus-Martan to Moscow. Since the First Chechen War, Chechens are routinely singled out for harassment by Russian police, vehicles are stopped and searched, identity papers demanded. Besides, there has long been a strong Chechen mafia in Moscow, very capable of getting its hands on arms or explosives in the city. In Russia, in the 1990s, you could bribe your way into a nuclear rocket silo. The 'Chechen terrorists' would have been risking a great deal by hauling their explosives roughly 1,000 miles to Moscow when they could have bought them at the back of a local flea market.