By 
President Donald Trump, who recently vowed to cut the cost of new Navy submarines, has various tools at his disposal that could help him achieve his goal, according to a naval expert.One such tool would be using multi-year procurement contracts for the Columbia-class ballistic missile submarine, which is currently in development, said Ronald O’Rourke, an analyst at the Congressional Research Service. Multi-year contracts, which give programs more stability than annual contracts, are already reducing the cost of Virginia-class attack submarines…
