(25.Januar 2003) As the Pentagon continues a highly visible buildup of troops and weapons in the Persian Gulf, it is also quietly preparing for the possible use of nuclear weapons in a war against Iraq, according to a report by a defense analyst.

Although they consider such a strike unlikely, military planners have been actively studying lists of potential targets and considering options, including the possible use of so-called bunker-buster nuclear weapons against deeply buried military targets, says analyst William M. Arkin, who writes a regular column on defense matters for The Times.