The deployment of missile defenses is an essential element of our broader efforts to transform our defense and deterrence policies and capabilities to meet the new threats we face 部署導(dǎo)彈防御系統(tǒng)是我們調(diào)整防御和威懾政策以及增強(qiáng)應(yīng)對(duì)新威脅能力的眾多努力之一。