reportedly became obsessed with Kappa when he was rebuffed by a woman in the sorority during his days as a student at the University of Cincinnati. The letters containing anthrax spores (which eventually killed 5 people and injured dozens more) were mailed from a drop box approximately 300 feet from a KKG storage facility at Princeton University, and only 60 feet from the KKG office. A US Government investigative panel, called the Expert Behavioral Analysis Panel, issued a report in March 2011 which detailed more of Ivins' obsession with the sorority. According to the panel's report, Ivins tormented sorority member Nancy Haigwood at the University of North Carolina. Ivins stole her notebook, which documented her research for her doctoral studies, and vandalized her residence. Membership In order to join Kappa Kappa Gamma, potential new members (PNMs) must be enrolled at a college or university with an active chapter of the fraternity. They must also have a minimum grade point average to be considered eligible. Women must participate in sorority recruitment and if they are issued an invitation to join, they enter the New Member period, the first of three phases of membership. After six to eight weeks, New Members are initiated and enter the second phase of membership as active collegiate members. Upon graduation, members enter the third and final phase of membership and become alumnae. Alumnae have the opportunity to join local alumna associations and remain active participants in fraternity life by engaging in social and philanthropic events, volunteering as advisers to collegiate chapters, and serving as fraternity council officers. Collegiate chapters Kappa Kappa Gamma has chartered a total of 161 chapters, 30 of which the fraternity has closed. Eight of the 30 closed chapters have been rechartered, and none of the rechartered chapters have been closed. Active chapters exist in 41 of the 50 states and Washington, D.C. as well as in three of the 10 Canadian provinces. The state with the largest number of active chapters is California, with 17 active chapters and one inactive chapter. Kappa has had active chapters at all nine of the University of California undergraduate campuses. The fraternity's most expansionary year was 1929, with six new chapters chartered. The fraternity's most expansionary decades were the 1980s, in which 19 chapters were chartered, and the 1920s, in which 18 chapters where chartered and one chapter was rechartered. The fraternity's least expansionary decades were