network runs a series of front companies selling automobiles and real estate. They also receive funds from extortion, kidnappings and smuggling operations throughout eastern Afghanistan. In an interview a former Haqqani commander called the extortion "the most important source of funding for the Haqqanis." According to a tribal elder in Paktia, "Haqqani's people ask for money from contractors working on road construction. They are asking money or goods from shopkeepers... District elders and contractors are paying money to Afghan workers, but sometimes half of the money will go to Haqqani's people." Military strength Haqqani is reported to run his own training camps, to recruit his own foreign fighters, and to seek out financial and logistic support on his own, from his old contacts. Estimates of the Haqqanis's numbers vary. A 2009 New York Times article indicates that they are thought to have about 4,000 to 12,000 Taliban under their command while a 2011 report from the Combating Terrorism Center places its strength roughly at 10,000-15,000. During a September 2011 interview, Sirajuddin Haqqani said the figure of 10,000 fighters, as quoted in some media reports, "is actually less than the actual number." Throughout its history the network's operations have been conducted by small, semi-autonomous units organized according to tribal and sub-tribal affiliations often at the direction of and with the logistical support of Haqqani commanders. The network is comprised broadly of four groups: those who have been with Jalalludin since the Soviet-era jihad, those from Loya Paktiya who have joined since 2001, those from North Waziristan who have joined in more recent years, and foreign militants of primarily Arab, Chechen and Uzbek origins. Leadership roles are mostly filled with personnel from the first group while the relative neophytes from Loya Paktia and non-Pushtuns are not part of this inner circle. The Haqqani network pioneered the use of suicide attacks in Afghanistan and tend to use mostly foreign bombers whereas the Taliban tend to rely on locals in attacks. The network, according to the National Journal, supplies much of the potassium chlorate used in bombs employed by the Taliban in Afghanistan. Also, the network's bombs use more sophisticated remote triggering devices than the pressure-plated activators used elsewhere in Afghanistan. Sirajuddin Haqqani told MSNBC in April 2009 that his fighters had, "acquired the modern technology that we were lacking, and we have mastered new and innovative methods of making bombs and explosives." In