Summary: The National Nuclear Security Administration's Office of Defense Programs seeks to maintain the safety and reliability of the nation's nuclear weapons stockpile without nuclear testing. This report discusses the Department of Energy's (DOE) management of its National Nuclear Security Administration's Stockpile Stewardship Program, focusing on the program's plans, budgeting, organization, and life extension process. Although the Office of Defense Programs has tried to address some of the challenges facing the Stockpile Stewardship Program, more improvements are needed. The Office of Defense Programs has developed an extensive planning process to improve the management of its Stockpile Stewardship program. So far, however, the plans are missing vital information. The Office has developed a new structure for its fiscal year 2001 budget that can improve the overall management of the Stockpile Stewardship Program. Several external and internal studies have found that the Office of Defense Programs has a dysfunctional organization with unclear lines of authority that lead to a lack of accountability. Finally, one of the nine types of nuclear weapons in the current stockpile has begun the life extension process--a step that will be necessary to keep the nation's nuclear weapons safe and reliable without explosive testing.