Atocha Train Bombing (2004)

The Atocha Train Bombing occurred on March 11, 2004, in Madrid, Spain, when terrorists placed ten explosive devices on commuter trains. The bombs detonated during rush hour, killing 193 people and injuring around 2,000 others. The attack was carried out by an Islamist extremist group and targeted Spain as a response to its military involvement in Iraq. It was one of Europe's deadliest terrorist incidents in recent history, leading to widespread mourning and a global call for increased security and counter-terrorism efforts.