SIMI VALLEY, CA -- The Pentagon acquisition chief said Dec. 2 a much-anticipated Defense Acquisition Board review of the F-35 will not convene until the joint program office's modernization plan has the necessary buy-in. The JPO expected to have approval for the new Block 4 strategy by the end of October, and officials have since said the plan will likely be approved early this month during a DAB, which will include a range of topics beyond modernization, including sustainment and...