Eduardo Sanz Pérez was 31. He had been born in Switzerland, the son of Spanish immigrants. He had grown up with his grandmother in Guadalajara, where he was still living with his wife and two-year-old son. His wife was seven months pregnant. Eduardo, who was a cook in the army, commuted to Madrid each day. He was in Atocha station when the terrorist attacks occurred and was killed in the blast.
11 March 2004 fell on a Thursday. Early that morning, a number of terrorists with links to Al-Qaeda planted thirteen bombs on four suburban trains covering routes running through Madrid. Ten of the bombs exploded between 7.37 and 7.39 am, when the trains were at Atocha, El Pozo and Santa Eugenia stations and alongside Calle Téllez. 191 people were killed in the attack and around 1,500 were wounded. It was the deadliest terrorist attack in Spanish history. On 3 April 2004, agents from the Special Operations Group (GEO) were about to enter an apartment in Leganés where the perpetrators of the attacks were believed to be hiding when the terrorists detonated twenty kilograms of explosives in an act of collective suicide. The ensuing blast killed one of the officers, bringing the total number of people killed by the 11 March bombers to 192.