The now ubiquitous surveillance image of the Brussels suicide bombers strolling through the airport corridor is enough to instill fear in anyone with plans to fly.
In the U.S., security officials are partly depending on bomb-sniffing dogs to thwart similar terror plots.
Since the 9/11 attacks, the number of canines deployed to protect the nation’s busiest airports, train stations and other transit centers has surged 400 percent.
A similar strategy is employed across the world. But the global war on terror’s ever-increasing reliance on man’s best friend is presenting a new problem — a deficit of high-quality bomb dogs.