Inexpensive natural gas makes the commercial case for new construction of nuclear power plants weak, but compelling reasons point to why America must nonetheless maintain its strength in the commercial nuclear power business. America’s historic interests in this area drove it to take the lead in designing a global regime of nuclear security. Moreover, our national security depends on secure base load power supply, particularly for critical facilities that now rely on a vulnerable the civilian grid. Sustaining nuclear power will require a federal government mandate. Small modular reactors (SMRs), and Department of Defense capabilities offer an attractive solution to this problem.