U.S. satellite shooting to raise space weapons worry

By Kristin Roberts

WASHINGTON (Reuters) - The U.S. decision to shoot down an ailing spy satellite raises new concerns about an arms race in space and could drive Russia and China to respond, analysts said on Thursday, voicing scepticism about the explanation for the move.

Space and security experts said they did not believe the Bush administration's justification for plans to fire a missile into a disabled satellite -- namely to prevent a potentially deadly leak of toxic gas as it re-enters Earth's atmosphere.

The Pentagon, they argued, was more likely testing its ability to target other states' satellites -- a suggestion rejected by U.S. officials.

Michael Krepon, security expert at the Henry L. Stimson Center, a private research group in Washington, called the Pentagon's reasoning "unpersuasive."

"If this man-made object causes human casualties or fatalities, they will be the first in the history of the space age," he said.

The Bush administration announced on Thursday it would try to shoot down a disabled U.S. spy satellite before it enters the atmosphere.

It will be the first time the United States conducts an anti-satellite operation since the 1980s, analysts said. Russia also has not conducted anti-satellite activities in 20 years.

China launched a ground-based missile into an obsolete weather satellite in January 2007 -- drawing international criticism and worries inside the Pentagon that Beijing now has the ability to target critical military assets in space.