Tuberculosis is one of the leading causes of death in the world today, with 4,500 people dying from the disease every day. Many cases of TB can be cured by available antibiotics, but some TB is resistant to multiple drugs—a major and growing threat worldwide. The Institute of Medicine''s Forum on Drug Discovery, Development, and Translation hosted a workshop on November 5, 2008, to address the mounting concern of drug-resistant TB. The session brought together a wide range of international experts to discuss what is known and not known about this growing threat, and to explore possible solutions.