When American defense officials meet informally with their allies and friends from other North Atlantic Treaty Organization countries, the conversation often turns to the growing disparity in combat capability between European and U.S. forces. The problem is bemoaned, but the participants are not stirred to action. This is unfortunate. We need a cross-Atlantic debate that seeks feasible solutions to this problem. Mind the Gap responds directly to that need. It not only dissects the problem of a growing disparity but also rejects its inevitability. Instead, it lays out a multitiered strategy for its solution which is specific and practical, including processes and procedures for implementation. The proposed strategy is complicated and would be difficult to execute; it would raise questions and even objections. That is as it should be. The alliance, nevertheless, has solved larger, more complex problems. We urgently need to find a way to close the gap because the problem is getting worse. The United States continues to implement its vision of a globally mobile military force equipped with the latest technology. The European members of NATO are not investing in similar capabilities. As a result, the gap will widen and be increasingly difficult to close.