Pentagon leaders should forgo certifying the F-35 to carry nuclear weapons and instead focus on quickly enabling a new long-range bomber to deliver the arms, according to former Air Force Chief of Staff Gen. Norton Schwartz. At the same time, Schwartz insisted that a multibillion-dollar program to upgrade the B-61, a type of nuclear weapon that would be delivered by the F-35, should proceed "in any case" -- including, notably, a precision-guidance tailkit component that Schwartz admitted would greatly increase...