"What I'm telling you is that we're focused here," Bush said from the Port of Baltimore, where he got a waterside demonstration of cargo-screening techniques. "When you're at war, you can't lose sight of the fact that you're at war."

Among the state-of-the-art techniques Bush observed were computerized systems, sophisticated radiation detectors and advanced X-ray equipment.

"You can look inside in the truck, and you don't even have to get in it," Bush said afterward to an audience of state and local officials and port employees. "That's called technology. And it's working. It makes a big difference."