Closing a Window, Slowly

Reagan decides to build the MX and B-1 but leaves a few doors open

The "window of vulnerability" is one of the more intriguing, and unsettling, concepts to occupy the restless minds of defense planners in years. It holds that the increasing size and accuracy of Soviet missiles will soon make the U.S. land-based nuclear force vulnerable to a first strike. Ronald Reagan last week moved to close that window, slowly, but serious doubts remained about whether he had succeeded.

In a press briefing at the White House, Reagan announced that he had decided to...

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