This letter formally transmits the attached briefing in response to Senate Report No. 110-77, which accompanied the National Defense Authorization Act for Fiscal Year 2008 (Pub. L. No. 110-181). The Senate Report requires GAO to review DOD's plans for the development of language and cultural awareness capabilities and to report to the congressional defense committees by December 31, 2008. On November 24, 2008, we provided the briefing to staff of congressional committees to satisfy this mandate. We plan to complete our work and issue a final report at a later date.