A powerful House lawmaker is proposing legislation that would block the Missile Defense Agency from flight testing the Standard Missile-3 Block IIA against an intercontinental ballistic missile target until the Pentagon's top weapons tester certifies the new Aegis interceptor works against the shorter-range threats it was originally designed to defeat. House Armed Services Committee Chairman Adam Smith (D-WA) included the provision in the chairman's mark of the panel's fiscal year 2020 defense policy bill in a move that could --...