Bush Lauds U.K. Response to Terror

Homeland Security Secretary Michael Chertoff listens to a reporter's question after a news conference outside the Peace Bridge Administration Building, Monday, June 25, 2007, in Buffalo, N.Y. Chertoff was at the Peace Bridge to discuss the needs of a U.S. Passport when returning to the United States from Canada at the international border crossing. (AP Photo/Don Heupel) (Don Heupel - AP)

Chertoff said he has spoken out for some time about U.S. worries involving potential terrorist threats originating in Britain and Europe.

"I think one of the issues we're increasingly concerned about is the movement of Europeans, including people with European citizenship, into areas of South Asia to get trained and get experience and then the prospect of these people coming back to carry out operations in Europe or in the United States using Europe as a departure point," Chertoff said.

"It's one of the reasons we've been very focused on increasing our security for people incoming from Europe. And that's something we're going to be looking at for the rest of the summer," he said.

Chertoff said officials are also concerned about the possibility of a copycat attack in the U.S., saying it is "another reason why we have put some additional security measures in place."

The U.S. increased the number of air marshals on flights between the United States and Europe last August and stepped up the pace over the past few months, Chertoff said. Last August, British police foiled an alleged plot by Muslim extremists to use liquid explosives to blow up as many as 10 flights between the United States and Britain.

"We haven't singled out Glasgow until a couple of days ago as a particular location for focus, but there has been a strategy of mixing up the deployment of these air marshals, sometimes more in one destination, sometimes more in another destination," he said.

"Going forward, we will be doing some enhanced air marshal work and similar types of activities with respect to U.K. travel."

Britain's new prime minister, Gordon Brown, said his country was dealing with terrorists associated with al-Qaida. Chertoff said, "If they are comfortable in confirming that, then that's fine. I have no reason to disagree."

A burning Jeep Cherokee rammed into Glasgow's airport terminal on Saturday. The day before, police in London found two cars packed with explosives.

One of the men in the airport attack was in critical condition at a hospital with severe burns, while the other was in police custody. Kenny MacAskill, the nation's justice secretary, said the two men were not born and raised in Scotland.

"Any suggestion to be made that they are homegrown terrorists is not true," MacAskill said.

Chertoff mentioned Iraq as a place where would-be terrorists can hone their skills in preparation for possible attacks around the world.

"What I do think we see in Iraq is a laboratory for techniques where people experiment with sophisticated forms of explosive devices, and we do get concerned that that will ultimately lead to importing those kinds of techniques to the West."

Chertoff appeared on NBC's "Meet the Press," ABC's "This Week," "Fox News Sunday" and "Late Edition" on CNN.

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Associated Press writers Katherine Shrader, in Washington, and Deb Riechmann, in Maine, contributed to this report.