Has ETA carried out attacks since the 9/11 attacks?
Yes. Since 9/11, ETA has been implicated in dozens of attacks, though many of them were minor and caused no injuries. Most of the attacks were preceded by a warning call, allowing people to evacuate before the explosion. Some experts say that ETA has been quieter than usual since 9/11 because of successful law enforcement measures.
Soon after 9/11, ETA set off car bombs in Vitoria and Madrid, injuring one hundred people but missing the government official targeted in the attacks. In March 2002, Spanish officials defused a bomb in the Bilbao Stock Exchange after receiving a tip under the name of ETA. Two months later, ETA took responsibility for two bombs that exploded outside the Santiago Bernabeu Stadium of Real Madrid, injuring seventeen people.
In December 2003, the Spanish police said they foiled an ETA plot to detonate two bombs in a Madrid train station. The detained ETA members reportedly told Spanish officials they had placed two additional bombs beneath railway lines in Aragón, one of which blew up a day early but injured nobody. For the next three years, ETA kept the conflict at a constant simmer, frequently bombing tourist and police targets but causing few injuries.