The 14 dead and more than 100 injured in the Cambrils and Barcelona attacks are of 34 different nationalities, according to local emergency services.
The site of the attack in Barcelona, Las Ramblas, is popular among tourists. It is a predominantly pedestrianised street stretching about three-quarters of a mile through the city center.
It especially busy in the summer — the height of tourist season.
Lt. Col. Jeff Addicott is a former officer in the Judge Advocate General corps and the current director of the Center for Terrorism Law. He joined Dan and Amy with reaction to the attack in Spain:
Col. Cedric Leighton is a military security consultant who served on the Joint Chiefs of Staff and the National Security Council. He also joined Dan and Amy with reaction to the attack in Spain: