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7月12日,洛克希德高级开发公司向空军战术司令部交付了最后59架F-117A隐身战斗机。这种隐形的多角式战斗机于1981年6月首次试飞,31个月之后签署了主尺寸研制合同。1982年洛克希德开始交付,1983年10月达到初期作战能力。过去7年中,每年只生产8架F-117A,包括研究发展费用,每架F-117A造价约1.06亿美元。除了这些费用之外,平均每架飞机的设备和器材成本是4260万美元,其中包括政府提供的历有装备。虽然新闻媒介猜测纷纭已有一些时候了,但这种飞机在1988年官方正式公布确有其
On July 12, Lockheed Advanced Development delivered the last 59 F-117A stealth fighter aircraft to the Air Force Tactical Command. This invisible multi-angle fighter jet first test-flight in June 1981, 31 months later signed the main dimensions of the development contract. Lockheed was delivered in 1982 and reached its initial operational capability in October 1983. In the past seven years, only eight F-117A were produced per year, including research and development costs, with a cost of about USD 106 million per F-117A. In addition to these costs, the average equipment and equipment cost per aircraft is $ 42.6 million, including the government-provided equipment. Although there have been some speculation in the media for some time now, this type of aircraft was officially announced in 1988