The document discusses the 2004 Madrid train bombings (known as 11M) and their impact on Spanish politics. It describes how the bombings, carried out by Al Qaeda and killing 192 people, reversed public opinion polls ahead of elections and led to an electoral defeat for the ruling conservative party. The socialists gained power and promptly withdrew Spanish troops from Iraq, reflecting the public's opposition to involvement in the Iraq War that motivated the bombings. Victims' families criticized how politicians and media exploited the attacks for political gain rather than seeking truth and justice.