Recrutiment Cells Abundant: Since the 2004 Madrid train bombings, which killed 191 people and injured more than 1,800 others, Spanish law enforcement forces have arrested 472 suspected al Qaeda militants or collaborators. During 2014, Spain’s continued vulnerability to terrorism is seen in the arrest and break-up of jihadist cells/networks accused of abetting the Islamic State of Iraq and ash Sham (Islamic State of Iraq, ISIS or ISIL) and Jabhat al-Nusra (JN). Current estimates on Spanish fighters in Syria vary between 35 and 95.