North Korea Nuke Test Plans?

(CBS/AP)  U.S. spy satellites have detected what may be preparations for North Korea's first test of a nuclear weapon, although analysts believe it could be a calculated ruse on Pyongyang's part, a U.S. defense official said.

The satellite images show North Korea has dug and refilled a significant hole at a suspected test site in Gilju in the northeastern part of the country, the official said Friday, discussing intelligence only on the condition of anonymity. The hole was dug in a manner consistent with preparations for an underground nuclear test, although it is not known whether the North Koreans deposited a weapon inside, the official said.

In addition, the official said, they have built some bleachers a sufficient distance from the hole, presumably for viewing any test.

Officials elsewhere in the U.S. government played down the remarks.

One who spoke on condition of anonymity said activity at the site could be consistent with preparations for a nuclear test, but other explanations are also possible.

The official said the U.S. government's working assumption is that North Korea could test with little notice and is believed to have the technical capability to do so. Its decision is considered to be one of politics.

Presidential spokesman Scott McClellan said he didn't want to get into discussing intelligence matters. "But what I would say is that if North Korea did take such a step, that would just be another provocative act that would further isolate it from the international community."

"All countries in the region are committed to seeing a nuclear-free peninsula," McClellan told reporters aboard Air Force One as President Bush traveled on the first leg of a five-day, four-country visit to central and eastern Europe.

At the State Department, spokesman Tom Casey said, "We don't have any new assessment" of North Korea. Casey said various North Korean statements had raised concerns and the United States was sharing them with other governments.

Although North Korea has claimed it has nuclear weapons, an actual test would be a first and confirm their capabilities to the world. U.S. intelligence and other estimates put the number of their weapons between one and six, so using one in a test would reduce their inventory by a significant amount.

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