The castle was built during World War II as an air defense base against German bombers.

该城堡建于二战期间，是个用于抵御德国轰炸机的防空基地。

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The Pentagon’sMissile Defense Agency is currently installing six interceptor missilesat Fort Greely in Alaska, and four at Vandenberg Air Force Base inCalifornia.

五角大楼的导弹防御局正阿拉斯加建造6枚截导弹，并在加利福尼亚范登堡空军基地投入4枚。

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Long-distance air observation is the premise of warship formation's aerial defense, and it is the base for warship formation to accomplish campaign assignment.

远程对空观察是水面舰艇编队对空防御的前提，是编队完成作战任务的基础，在编队防御作战中起着非常重要的作用。

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Although the revised plan involves anti-ballistic missiles installed at a former air base in Poland, defense experts say Moscow perceives the new project as less threatening to its security.

VOA: standard.2009.10.23

However, DOD also is inviting the Russian military to take part in a Joint Center for Year 2000 Strategic Stability to be located at the North American Aerospace Defense Command headquarters, Peterson Air Force Base, Colo.

CNN: Y2K failures abroad threaten U.S. security