The Islamic State struck again on Aug. 17, when a van ran over people in downtown Barcelona, killing at least 13 and leaving over a hundred injured. Then in the early hours of Aug. 18, police killed five suspected terrorists after they plowed into people in the city of Cambrils, killing one person. Investigations are underway after the two terrorist attacks in Spain's Catalonia region. Security forces have arrested four suspects, and they are trying to determine whether the driver of the Barcelona van was among them. The attackers' original intention was probably to conduct a large truck bombing in Barcelona. In fact, a safe-house in Alcanar (about 203 kilometers or 126 miles south of Barcelona) exploded on Aug. 16 while at least two people were making the explosives for vehicle bombs. The vehicular assaults were deadly, but the bomb attack could have potentially been far more damaging.