The Pentagon's top weapons buyer is considering a $3 billion installment order for the military's largest fighter jet program, a decision that could allow the Air Force, Navy and two European allies the opportunity to move forward with the purchase of 17 F-35 Joint Strike Fighters. John Young -- the Pentagon's acquisition executive -- received a proposal from the JSF program office on Nov. 12. The program manager, Maj. Gen. Charles Davis, asked for the authority to proceed with the...