On May 13, 2011, the Social Security Board of Trustees will release an annual report detailing the current and projected financial status of the program, including the level of reserves in the Social Security trust fund. In this video Eric Toder, codirector of the Tax Policy Center, explains what the Social Security trust fund was designed to do, what observers will be looking for in the trustees' report, and why the program is on an unsustainable path in the long run.