Increasing worries for some of a new nuclear arms race. Matthew Bunn is a professor specializing in nuclear arms control at Harvard Kennedy School and joins me now. Welcome to the program.

Matthew Bunn, a professor specializing in nuclear arms control at Harvard's Kennedy School, tells NPR's Ayesha Rascoe about concerns over a new nuclear arms race as the U.S. looks increasingly inward.

tells NPR's Ayesha Rascoe about concerns over a new nuclear arms race as the U.S. looks increasingly inward. KUOW is Seattle’s NPR news station. We are an independent, nonprofit news ...