Dr. James Polk, NASA’s chief health and medical officer, provides an update on the International Space Station and its crew, Thursday, Jan. 8, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

Dr. James Polk, NASA’s chief health and medical officer, provides an update on the International Space Station and its crew, Thursday, Jan. 8, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

Dr. James Polk, NASA’s chief health and medical officer, center, speaks alongside NASA Administrator Jared Isaacman, left, and Amit Kshatriya, NASA associate administrator, as they provide an update on the International Space Station and its crew, Thursday, Jan. 8, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

Dr. James Polk, NASA’s chief health and medical officer, center, speaks alongside NASA Administrator Jared Isaacman, left, and Amit Kshatriya, NASA associate administrator, as they provide an update on the International Space Station and its crew, Thursday, Jan. 8, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jared Isaacman, left, speaks alongside Amit Kshatriya, NASA associate administrator, center, and Dr. James Polk, NASA’s chief health and medical officer, right, as they provide an update on the International Space Station and its crew, Thursday, Jan. 8, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jared Isaacman, center, speaks alongside Amit Kshatriya, NASA associate administrator, left, and Dr. James Polk, NASA’s chief health and medical officer, right, as they provide an update on the International Space Station and its crew, Thursday, Jan. 8, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jared Isaacman, is seen as he provides an update on the International Space Station and its crew, Thursday, Jan. 8, 2026, at the Mary W. Jackson NASA Headquarters building in Washington. Photo Credit: (NASA/Joel Kowsky)