Information on Nuclear Smuggling Incidents Since the early 1990s, there have been numerous reports of illicit trafficking in many types of nuclear materials worldwide. According to IAEA, nuclear materials include nuclear source material, such as natural uranium, depleted uranium, thorium, plutonium, and uranium enriched in the isotopes U-233 or U-235. Plutonium and highly enriched uranium (HEU)—known as weapons usable material-are considered to pose the greatest proliferation risk because they are used to produce nuclear weapons. In 1993, IAEA established a database to record incidents involving illicit trafficking in nuclear materials. Sixty-nine countries, or about one-half of IAEA's member states, currently participate in the database. As of December 31, 2001, IAEA listed 181 confirmed incidents involving the illicit trafficking in nuclear materials, including weapons-usable material. According to IAEA, a confirmed incident is one in which the information has been verified to IAEA through official points of contact from the reporting country. Of the 181 confirmed illicit trafficking incidents reported by IAEA, 17 involved either HEU or plutonium. More than half of the 17 incidents involving weapons-usable material occurred during 1993-95. The remaining cases occurred during 1999-2001. chart noting weapons-grade seizures…: http://www.atomicarchive.com/Almanac/Smuggling.shtml