As many as 230,000 jihadists are spread across 70 countries, with the largest concentrations of terrorists located in Syria, Afghanistan, and Pakistan, according to the Center for Strategic and International Studies, a Washington DC think tank.

The shocking reported spike in the number of Sunni jihadists worldwide raises serious questions about the effectiveness of the US-led Global War on Terrorism, which was launched in the wake of the deadly attacks on the Twin Towers and the Pentagon on September 11, 2001.