French Foreign Minister Jean-Noel Barrot speaks at the Belfer Center for Science and International Affairs at Harvard University's Kennedy School of Government in Cambridge, Massachussetts, on September 25, 2025. (Photo by JOSEPH PREZIOSO / AFP) (Photo by JOSEPH PREZIOSO/AFP via Getty Images)

Attendees listen as French Foreign Minister Jean-Noel Barrot speaks at the Belfer Center for Science and International Affairs at Harvard University's Kennedy School of Government in Cambridge, Massachussetts, on September 25, 2025. (Photo by JOSEPH PREZIOSO / AFP) (Photo by JOSEPH PREZIOSO/AFP via Getty Images)

French Foreign Minister Jean-Noel Barrot speaks at the Belfer Center for Science and International Affairs at Harvard University's Kennedy School of Government in Cambridge, Massachussetts, on September 25, 2025. (Photo by JOSEPH PREZIOSO / AFP) (Photo by JOSEPH PREZIOSO/AFP via Getty Images)

French Foreign Minister Jean-Noel Barrot (L) speaks at the Belfer Center for Science and International Affairs at Harvard University's Kennedy School of Government in Cambridge, Massachussetts, on September 25, 2025. (Photo by JOSEPH PREZIOSO / AFP) (Photo by JOSEPH PREZIOSO/AFP via Getty Images)

French Foreign Minister Jean-Noel Barrot speaks at the Belfer Center for Science and International Affairs at Harvard University's Kennedy School of Government in Cambridge, Massachussetts, on September 25, 2025. (Photo by JOSEPH PREZIOSO / AFP) (Photo by JOSEPH PREZIOSO/AFP via Getty Images)

French Foreign Minister Jean-Noel Barrot speaks at the Belfer Center for Science and International Affairs at Harvard University's Kennedy School of Government in Cambridge, Massachussetts, on September 25, 2025. (Photo by JOSEPH PREZIOSO / AFP) (Photo by JOSEPH PREZIOSO/AFP via Getty Images)

French Foreign Minister Jean-Noel Barrot speaks at the Belfer Center for Science and International Affairs at Harvard University's Kennedy School of Government in Cambridge, Massachussetts, on September 25, 2025. (Photo by JOSEPH PREZIOSO / AFP) (Photo by JOSEPH PREZIOSO/AFP via Getty Images)

French Foreign Minister Jean-Noel Barrot (L) walks with Harvard's Natalie Colbert as he arrives to speak at the Belfer Center for Science and International Affairs at Harvard University's Kennedy School of Government in Cambridge, Massachussetts, on September 25, 2025. (Photo by JOSEPH PREZIOSO / AFP) (Photo by JOSEPH PREZIOSO/AFP via Getty Images)