Lawmakers are pushing the Navy to address its submarine maintenance backlog at shipyards following a watchdog report that found the service spent over $1.5 billion in the last decade on vessels it could not operationally deploy. While the Government Accountability Office issued findings about the Navy's attack submarines last month, lawmakers zeroed in on the subject during last week's joint hearing of the Senate Armed Services seapower and readiness and management support subcommittees. Sen. Mike Rounds (R-SD), who sits on...