An international incident 38 years ago this month remains shrouded in mystery. On the bitterly cold morning of Jan. 23, 1968, an American intelligence vessel, USS Pueblo, was operating in international waters off the coast of North Korea. It was surrounded by four North Korean patrol boats, with two MiG aircraft flying overhead. The boats ordered the Pueblo to stop and let the North Koreans board. The order was refused. The Pueblo headed further out to sea. The North Korean boats immediately opened fire. Armed with only a 50-caliber gun secured from the freezing temperatures by a tarp, the Pueblo...