Raytheon Missile Systems, Tucson, Arizona, is being awarded a sole source, cost only contract modification which adds more work. Under this modification, the “pacing items only” restriction is removed and the contractor is now authorized to work the full, unchanged, effort to manufacture, assemble, test and deliver 20 Standard Missile-3 Block IIA missiles and related efforts, and four missiles under Foreign Military Sales (FMS) case JA-P-ATB to Japan. The work will be performed in Tucson, Arizona; and Huntsville, Alabama, with an estimated completion date of December 2022.