For the first time in decades, the United States now has at least three new nuclear weapons making their way toward service, including a new long-range air-launched nuclear cruise missile, a powerful new nuclear bomb, and the nation’s first new ICBM — or intercontinental ballistic missile — since the 1970s.But these aren’t the only new nuclear weapons to emerge in recent years… And the truth is, America’s global adversaries have a number of new weapons of their own.