Today, the Obama administration and Congress have a variety of options before them for strengthening the defense of the U.S. homeland against ballistic missile attack. The word “options,” however, should not be interpreted as an either/or choice. Official Washington should not—indeed, cannot choose between defending the homeland against ballistic missile attack and erecting regional capabilities against the threat. Rather, it is necessary to treat the variety of programs available for this purpose not as options, but as components of a global plan for development and fielding: essentially, an “all of the above” approach. Only in this way can America achieve the proper balance between missile defense capabilities for the protection of the United States and the protection of our friends and allies and forces in various regions around the world...