By William Tucker
The zone of military operations will be extended to the territory of Russia. Praise be to Allah, the past year has shown us, and also to all who had some doubts, to Putin and Nurgaliyev (Russian interior minister -KC) that the Brigade of Martyrs, Riyad-us-Saliheen, has been really recreated and is in action. We witnessed many special operations by this Brigade during the last year. The Martyrs' Brigade is replenished with the best among the best of the Mujahedeen and if the Russians do not understand that the war will come to their streets, that the war will come to their homes, so it is worse for them. Blood will no longer be limited to our (Caucasus) cities and towns. The war is coming to their cities. If Russians think the war only happens on television, somewhere far away in the Caucasus where it can't reach them, Insha'Allah (God willing), we plan to show them that the war will return to their homes. Therefore, the zone of military actions will be extended to all Russia, Insha'Allah, and I hope that this year we, Insha'Allah, with Allah's help, could expect successful operations.
Caucasus Emirate's Emir Dokka Abu Usman via Kavkaz Center on 3 February 2010
During rush hour this morning two suicide bombers struck the Moscow subway killing 38 and wounding over 60. The first attack occurred just before 8:00 a.m. local time at Lubyanka station with the second attack occurring about 40 minutes later striking Park Kultury station. Alexander Bortnikov, the head of the Federal Security Services (FSB), said terrorists from Russia's North Caucasus may have been involved in the attacks. Adding to this, Vladimir Markin of the Prosecutor's Investigative Committee stated that two female suicide bombers were suspected of the attack. Some news outlets are claiming that the heads of the bombers have been recovered which will help in identification if this is indeed accurate.
Background
It is not unreasonable to suspect the involvement of North Caucasus militants as Moscow has been waging war against separatist elements in the region since the 1990's. Despite Moscow's claim that counterterrorism operations in Chechnya have been completed militant activity persists in Chechnya, Dagestan, and Ingushetia. This is not to say that Russia has been without success in the region, rather it is merely a fact that Moscow has been operating in this region against Islamist Nationalist militants and has not been able to completely pacify the region. Russia has managed to successfully exploit the Chechen clan rift in which one was promoted over the other leading to a semblance of stability in Grozny.
The clan war that has led to the current political arrangement in Chechnya was fought during the Second Chechen War by the Russian backed Kadyrov and Yamadayev clans against the Islamist clan led by Shamil Basayev. Basayev is widely known for orchestrating the 2002 Moscow theater siege and the Beslan School Massacre of 2004. The Kadyrov and Yamadayev clans eventually marginalized Basayev forcing the Islamist into exile. Basayev continued to operate and plan attacks in the Caucasus region against the Kadyrov clan and Russian targets until he was killed in 2006. The current head of the Caucasus Islamists, Dokka Usman, has threatened to attack Russia proper on many occasions and is most likely behind today's attack although he has yet to claim responsibility.
Like most Islamist militant groups, the Caucasus Emirate has sophisticated political and military apparatuses that have specific responsibilities and can function as a shadow government. In the case of the Caucasus Emirate, the external operations are the responsibility of the Riyad-us-Saliheen Martyr Brigade (translated in English as 'Garden of Paradise Martyr Brigade') which has successfully conducted attacks against a variety of targets across Russia. According to the Russian FSB, today's attack was perpetrated by the 'Black Widows' which is an all female suicide bomber brigade made up of wives or relatives of Chechen's slain during the wars with Russia.
Tactical Assessment
The two suicide bombers struck the subway during the height of rush hour. This would have provided the attackers with the ability to cause a higher casualty rate and complicate recovery efforts as people struggling to get out would have hindered rescuers trying to get in. Furthermore, the bombers struck on opposite sides of the same line effectively shutting the Sokolnicheskaya line down until the completion of rescue efforts. By targeting the Sokolnicheskaya line in this fashion it is unlikely that one of the bombers was meant to infiltrate the FSB building as some have begun to speculate. Also, the Lubyanka station, which was struck first, is nearest to the FSB building and there is no indication that bomber attempted to leave the station.
Both suicide bombs were constructed with TNT and packed with shrapnel to inflict casualties without having to use a substantial amount of explosives. When constructing a wearable bomb, militants tend to balance the amount of explosives with hardware such as, nuts, bolts, or ball bearings. This allows terrorists to conserve explosive material since it is more difficult to come by without sacrificing the number of future operations that can be carried out. Reports from the FSB have stated that the bomber that hit the Lubyanka station used about 4 kg (8.8 lbs) of TNT, while the Park Kultury station bomber used 1.5 kg (3.3 lbs) of explosives.
As an aside it is strange that the bombers chose to detonate their bombs when and where they did. Planning an attack on an underground subway system usually entails hitting two consecutive metro stops on the same line at the same time in an attempt to box people in a smaller area and complicate rescue efforts. Additionally, when the box, or kill zone to use ambush jargon, is created a third bomber would typically strike in the center. This third detonation would be meant to target first responders tending to the wounded in situ. This begs the question: is the militant's ability to launch meaningful attacks waning, or are security measures in Moscow improving?
The Russian Response
The Caucasus region is very sensitive to Russia. It has been a constant thorn in Moscow's side since it was first integrated into the Russian Empire. Since then the Soviets, and now the Russian Federation, have struggled to come up with a meaningful solution for the area that will allow Moscow to keep the Caucasus as a buffer region to the south without overly taxing the Russian military and intelligence agencies. Because of its inability to pacify the region Russian still has a substantial military and intelligence presence to handle the multitude of issues present in the Caucasus. As such, we can expect the Kremlin to respond to this attack very soon most likely by targeting Dokka Usman, the Emir of the Islamist movement, directly. The wars fought between the Russians and the Islamist-Nationalist militants have been bloody affairs and it is unlikely that this new round of fighting on the horizon will be any different.

Moscow Metro Map credit: BBC
Caucasus Region Map: U.S. State Department