151010-N-AC887-003 GROTON, Conn. (Oct. 10, 2015) First Lady Michelle Obama breaks a bottle of champagne against Pre-Commissioning Unit (PCU) Illinois (SSN 786) as John Casey, president of General Dynamics Electric Boat and Secretary of the Navy (SECNAV) Ray Mabus look on. Illinois is the Navy’s newest Virginia-class submarine and the second Navy vessel to bear the "Prairie State's" name. (U.S. Navy photo by Chief Mass Communication Specialist Sam Shavers/Released)