The head of U.S. Strategic Command, an Air Force general with responsibility for the entire nuclear triad, publicly raised concern this week about the ability of the Columbia-class submarine program to absorb further delays in the wake of faulty welding discovered last year, departing from Navy leadership assurances about the schedule for the $126 billion project. Gen. John Hyten, STRATCOM head, told the Senate Armed Services Committee that as part of a "deep dive" into each element of the U.S...