2006 Madrid–Barajas Airport bombing
On 30 December 2006, a van bomb exploded in the Terminal 4 parking area at the Madrid–Barajas Airport in Spain, killing two and injuring 52. On 9 January 2007, the Basque nationalist and separatist organisation ETA claimed responsibility for the attack.
Source: Wikipedia — 2006 Madrid–Barajas Airport bombing (CC BY-SA 4.0)