The Bureau of Overseas Buildings Operations (OBO) directs the worldwide overseas building program for the U.S. Department of State. Working with other offices and bureaus, foreign affairs agencies, and Congress, OBO sets worldwide priorities for the design, construction, acquisition, maintenance, use, and sale of real properties and the use of sales proceeds. As the single real property manager for the U.S. government's diplomatic facilities overseas, OBO's portfolio spans 285 worldwi