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In shorthand often used to describe the brain, fear is controlled by a small, almond-shaped structure called the amygdala.

But it's not quite that simple, as a study published Sunday in Nature Neuroscience demonstrates.

Government agencies do not often acknowledge their own errors, but the CIA has done just that with the declassification of intelligence memoranda on the 1973 Arab-Israeli War.

The documents show that agency analysts, down to the last minute before the outbreak of fighting, were assuring President Nixon, Secretary of State Henry Kissinger and other policymakers that Egypt and Syria were unlikely to attack Israel.