Some intelligence experts have a contrary view - that the Iraq war has increased terrorism. Counterterrorism expert Rohan Gunaratna frequently refers to the invasion of Iraq as a "fatal mistake." London's conservative International Institute for Strategic Studies concluded in 2004 that the occupation of Iraq had become "a potent global recruitment pretext" for jihadists and that the invasion "galvanised" al-Qaeda and "perversely inspired insurgent violence" there. The U.S. National Intelligence Council concluded in a January 2005 report that the war in Iraq had become a breeding ground for a new generation of terrorists; David B. Low, the national intelligence officer for transnational threats, indicated that the report concluded that the war in Iraq provided terrorists with "a training ground, a recruitment ground, the opportunity for enhancing technical skills... There is even, under the best scenario, over time, the likelihood that some of the jihadists who are not killed there will, in a sense, go home, wherever home is, and will therefore disperse to various other countries." The Council's Chairman Robert L. Hutchings said, "At the moment, Iraq is a magnet for international terrorist activity." And the 2006 National Intelligence Estimate, which outlined the considered judgment of all 16 U.S. intelligence agencies, held that "The Iraq conflict has become the 'cause celebre' for jihadists, breeding a deep resentment of US involvement in the Muslim world and cultivating supporters for the global jihadist movement." According to Mohammed Hafez, "Since 2003, the number of suicide bombings in Iraq has surpassed all those of Hamas in Israel, Hezbollah in Lebanon, and the Tamil Tigers in Sri Lanka combined."