奥巴马实现国家安全的手段也得到了拓展，他的“3D理念”将防御（defense ） ， 外交（diplomacy）和发展（development）组成一个不可分割的整体。
Obama’s approach to security is broader as well, proposing the “three Ds” – defense, diplomacy, and development – as indivisible parts of a whole.