As long as terrorists take cowardly measures to kill without having to fight, it looks like Man's relationship with dogs will grow even stronger.

The Associated Press reports that bomb-sniffing dogs are still the most effective and most economical means to detect bombs:

But ideas such as smoke-detectorlike devices sounding an alarm when a bomb-porting terrorist enters a train station are years and billions of dollars from fruition — if ever. The best current defenses for the country's subways, buses and trains, security experts say, remain decidedly low tech: human vigilance and bomb-sniffing dogs.

The article goes on to list out a variety of high-gadgets in the works to detect bombs in subways and buses, but nothing else is capable of detecting the scent of a bomb than Man's best friend.