Report reveals new details about the U.S. Navy’s Next-Generation Attack Submarine, or SSN(X). The sub, which begins procurement in 10 years, will refocus the U.S.’s undersea fleet away from supporting land wars to fighting enemy fleets both above and below the waves. The Navy’s current attack submarine fleet consists of a mix of older Los Angeles-class submarines, Seawolf-class submarines (shown above), and the latest class of Virginia-class subs. The Virginia class, currently in production