The Defense Department expects to wrap up an assessment of U.S. missile defenses this spring, but a top official would not put a time frame on its completion as DOD weighs "competing approaches" to future threats. Under Secretary of Defense for Policy John Rood told the Senate Armed Services strategic forces subcommittee today that DOD is still working on the Missile Defense Review directed by President Trump in January 2017. "We're looking in the near term here in the spring...