Beatriz Díaz had been working as a waitress for twenty years. With great difficulty, she had bought an apartment in the Vallecas district and was saving up for a holiday in Cadiz that summer. Her nine-year old son was going to make his First Communion in May and Beatriz had already prepared everything even the gifts. On the morning of 11 March she was travelling towards Atocha station. She died on the train that was blown up beside Calle Téllez. Due to an error identifying the body, her family had to go through the bitter ordeal of attending two burials.
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.