The Pentagon's two-year-old plan to establish by 2020 the ability to shoot down Iranian ballistic missiles flying toward Europe or the U.S. eastern seaboard is "not credible," a lawmaker said today, citing the conclusion of an unpublished report from an influential Pentagon advisory board. Sen. Richard Shelby (R-AL) told the Senate Appropriations defense subcommittee today that findings of a Defense Science Board task force on the feasibility of early intercept ballistic missile defense raise question about a key element of...