Defense Secretary Chuck Hagel visited Airmen from the 90th Missile Wing to learn about the ICBM mission Jan. 9, 2014, at F.E. Warren Air Force Base, Wyo. While flying back to Washington D.C. from the Munich Security Conference in Germany, the secretary made a series of surprise phone calls to six Malmstrom Air Force Base officers pulling alert duty Feb. 1, 2014. In a series of candid conversations that lasted大约一个小时,黑格尔秘书传达了他对执行核任务的能力以及对他们对国家的关键服务的欣赏能力的信心。 (美国空军照片/R.J。Oriez)