 The terminal, designed by Antonio Lamela and Richard Rogers, had been inaugurated just a few months before, on February 5, 2006.According to reports, the van was carrying of an unknown kind of explosive, probably a mix of ammonium nitrate and hexogen, becoming the third most powerful explosive device ever used by ETA.The explosion demolished almost all of the five floors of the car park and produced around 40 tones of debris, with the zone being compared by Spanish authorities to the World Trade Center ground zero, as well as damaging at least 1300 vehicles parked in the terminal.