Nuclear

B-61: A Nuclear Weapon that Penetrates Deep into the Earth Before Exploding


Senate Wants Energy Dept. Assessment of Earth Penetrating Nuke

Source: U.S. Defense
http://www.USDefense.com

June 13, 2000

A new Senate bill would require the Energy Department to assist the Pentagon in studying a new type of nuclear weapon designed to penetrate deep into the earth before exploding.

The new weapon, which has a lower yield than most ICBMs, is designed to destroy enemy command and control bunkers buried deep inside mountains or well below the earth's surface.

The purpose of the study is to develop "a deep penetrator that could hold at risk a rogue state's deeply buried weapons or Saddam Hussein's bunker without torching Baghdad," said one former senior Pentagon official who is still involved in government military and intelligence research, the Washington Post reported on Monday.

The weapon, designated B-61, was most recently modernized in the 1990s. At that time the bomb, which has a variety of yields above 50 kilotons (or 50,000 tons of TNT, more than three times the power of the Hiroshima bomb), was given an earth-penetrating capability great enough to destroy "a garden variety underground bunker, 100 meters into solid rock," the former official said.

"What's needed now is something that can threaten a bunker tunneled under 300 meters of granite without killing the surrounding civilian population," the official told the newspaper.

The Pentagon tried unsuccessfully last year to enlist Energy's assistance with the project. Lawyers for the Energy Department said the agency was prohibited from researching the project a 1994 provision in the law prohibited the government's nuclear laboratories from "all research and development which could lead to a precision, low-yield nuclear weapon," said one unnamed Energy Department source.

To overcome that provision, the Senate has placed language in the FY 2001 Defense Authorization bill specifically requiring the Defense and Energy Departments to cooperate in researching potential "bunker-busting" uses for the weapon.

The measure is expected to pass the Senate this week and eventually be approved by a House-Senate conference, according to its supporters.

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