You asked tha the Office of inspector General examine the circumstances surrounding a recent incident at the National Nuclear Security Administratin's Los Alamos National Laboratory concerning the possible compromise of classified data. Your request focused on what the Department of Energy and its contractors did or did not do to protect classified information, specifically, the steps that were taken to ensure that only properly qualified idividuals had access to such information. Thsi memorandum summarizes our findings in this matter. Because of cyber security and Privacy Act considerations, detailed findings are provided in a non-public attachment of this memorandum.