The collapse of the country's economy has created chronic food shortages that have fueled malnutrition and left millions seeking food anywhere they can find it.
For many civil rights advocates, Charlottesville was a prominent example of a disturbing trend: rising violence from hate groups.
The tree-lined main street is known as La Rambla, although the crisscrossing side streets has the strip collectively called Las Ramblas.
Catalan authorities said they had arrested one man for the attack in Las Ramblas, a district popular among tourists.
The use of cars, trucks, planes and other vehicles is growing in popularity as a means of inflicting terror.