The President of the United States commands the world's strongest military, leads the dominant economy — and often lays claim to leadership in global morality. We ask commentators in other countries if they think Donald Trump is qualified for the White House.
Later on the program, after almost a year on the International Space Station, NASA's record-setting astronaut Scott Kelly is back on the ground. We hear what scientists want to learn from comparing him to his Earth-bound twin brother and we ask another space veteran what it's really like out there.
Photo: Mike Licht