The aircraft is displayed under cover in the USAF Gallery.

【cover】这架在美国空军陈列室内展出。

Anyway, the USAF announced that they could not follow up on all 400 of the reported UFO sightings.

我没有具体的报道。无论如何，美国空军宣布他们无法对所有400起报告的不明行物目击事件进行跟进调查。

The United States Air Force (USAF) is re-engining its B-52 fleet through the Commercial Engine Re-engining Program (CERP).

美国空军 (USAF) 正在通商业重新设计计划 (CERP) 重新设计其 B-52 队。

The B-52, often known as the Stratofortress or the Buff (Big Ugly Fat Fellow), is the USAF's long-range, large-payload multirole bomber.

B-52，通常被称为“Stratofortress” 或“Buff” （丑陋的大胖子），是美国空军的远程、大有效载荷多用途轰炸。

The USAF issued bid invitations for these requirements on February 13, 1946, with Boeing, Consolidated Aircraft, and Glenn L. Martin Company submitting offers.

美国空军于 1946 年 2 月 13 日针对这些要求出招标邀请，波音公司、联合公司和格伦·马丁公司提交了报价。