洛克希德-马丁公司为英国生产的首架 F-35B（BK-1）战机在得克萨斯州沃思堡首飞，此次试飞中，BK-1号以短距起飞方式升空，常规方式降落，整个试飞时间为45分钟。（F-35 BK-1 First Flight.The first flight for the U.K.’s first F-35, known as BK-1, took place on April 13, 2012. BK-1 is also the first international F-35.）

洛克希德-马丁公司为英国生产的首架 F-35B（BK-1）战机在得克萨斯州沃思堡首飞，此次试飞中，BK-1号以短距起飞方式升空，常规方式降落，整个试飞时间为45分钟。（The first flight for the U.K.’s first F-35, known as BK-1, took place on April 13, 2012. BK-1 is also the first international F-35.）