A bureaucratic maneuver last summer by the Office of the Secretary of Defense aimed at clipping the wings of the Missile Defense Agency has drawn an investigation and a statutory directive to halt any action that would lock in rules subjecting MDA to increased oversight by other arms of the Defense Department. The Fiscal Year 2021 National Defense Authorization Act, enacted in late December, includes a provision that questions the propriety of then-Deputy Defense Secretary David Norquist's 17-page directive-type memorandum...