Juan Muñoz did not usually take the train, but on the morning of 11 March he made an exception so that he could accompany his girlfriend. They had started dating a few months before and were both very excited about the future. Aged 32, he worked at ADATEL, one of the communications companies in the Jazztel group. He had been on sick leave for several months due to a motorcycle accident, after which he had had to use crutches. He had just bought a house in San Agustín de Guadalix, a village in the mountains outside Madrid, and used to spend much of his time working on it. He and his girlfriend were killed in the bomb explosions at El Pozo station.
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.