Issuing yet the latest warning of the threat of nuclear terrorism in the U.S., Homeland Security Secretary Michael Chertoff said there are far worse security problems facing the country than bombings of mass-transit systems.

In comments during a visit to Lawrence Livermore Laboratory in California this week, Chertoff said the foremost concern for the nation’s security now is the threat of a larger chemical, biological or nuclear attack.

Chertoff joins the growing list of public officials – including President Bush, Vice President Dick Cheney and Chertoff’s predecessor at Homeland Security, Tom Ridge – who have strongly hinted that nuclear terrorism has moved center stage as the No. 1 security threat facing the U.S.

Last month WND and its sister publication, Joseph Farah’s G2 Bulletin, reported increasing evidence suggests al-Qaida not only has nuclear weapons in its arsenal, but has smuggled them into the U.S. along with thousands of sleeper operatives.

Michael Chertoff

Referring to the London bombings, Chertoff said: “We can’t let what happened two or three weeks ago beguile our concerns about what could happen in the future.”

Technology that the Livermore lab and other public and private groups are developing could help make the country safer, Chertoff said. The secretary was shown what the lab has done to provide more portable ways to detect nuclear, biological and chemical devices that terrorists could use.

“We want to show the secretary how we are working very aggressively to help win the war against terrorism,” said laboratory director Michael Anastasio.

The work by the Livermore lab shows the enormous capabilities the country is bringing to bear against terrorism, Chertoff said.

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