The explosive TATP has been used in several deadly terrorist attacks over the past two decades, which is why it is important that police are able to detect it.
But the substance is extremely dangerous to handle, making it difficult to train police dogs or to test detector devices in crowded places like airports.
That’s why European researchers have come up with a safe alternative — a TATP spray.
Brussels Airport was the site of a bomb attack in 2016 that claimed 32 lives and injured over 300 other people.
Here, police have trained specialist dogs to trace even the tiniest amounts of explosives.