On March 11, Spain marks 20 years since Europe’s worst Islamist attack when militants claiming to be acting on behalf of Al-Qaeda bombed commuter trains in Madrid, killing 192 people and wounding nearly 2,000 others. The perpetrators said the attack was revenge for Spain’s role in the US-led invasion of Iraq. A decade later, jihadists invoked the West’s intervention against the Islamic State (IS) group in Iraq and Syria to unleash a new wave of […]