As thousands of fans attend World Cup matches in North Texas, specialized “vapor wake” detection dogs are playing a key role in stadium security, helping authorities identify potential explosive threats in crowded environments.

The Arlington Fire Department showcased the K-9 units, including Arlo and his handler, bomb technician Manuel Carrillo. Unlike traditional detection dogs, vapor wake dogs can identify trace explosive scents left in a person’s wake, allowing them to spot threats concealed in backpacks, purses, or even suicide vests.