In this report, we examine in some detail the growing threats from different actors in different regions of the world, and note the challenges they present to calculating an appropriate mix of capabilities and force structure. (16-20) To lessen risk in an environment that is becoming more challenging over time, it is important to err on the side of having too much rather than too little. We agree with the 2014 QDR's emphasis on the centrality of East Asia as well as the continued importance of the Middle East to our security in the 21st century. At the same time, we note that current...