HIROSHIMA/NAGASAKI – On April 27, representatives of the Nuclear Non-Proliferation Treaty’s 190 member countries will meet in New York for a four-week review of the 45-year-old pact. The attendees would be wise to consider an important fact: Although the NPT requires its members to “pursue negotiations in good faith” on nuclear disarmament, a wide legal gap still remains when it comes to eliminating nuclear weapons.