A new report from the office of the Pentagon's chief weapons tester criticizes the F-35 program's rollout of its Block 4 capabilities, finding officials have failed to complete "adequate operational testing" before fielding "immature, deficient and insufficiently tested mission systems software" to the existing fleet. The $14 billion modernization effort, which began in 2018, aims to incrementally deliver new software upgrades to the warfighter following review from a developmental test team -- groups that the fiscal year 2021 annual report,...
