The Pentagon official charged with building a defensive system to protect the United States from ballistic missile attack told a Senate subcommittee yesterday that a sea-based system "would make sense at some point in time," but there is no rush to include it now in the Defense Department's National Missile Defense architecture. Lt. Gen. Ron Kadish, director of the Ballistic Missile Defense Organization, said he has been actively engaged with Navy officials in an architecture study showing how a sea-based...