Scientists take to the streets, gays in the Korean military, France heads to the polls

Today, we talk about why scientists are taking to the streets on Saturday in a global series of protests dubbed the first March for Science. And, will Thursday's attack in Paris affect the way people vote in the country's too-close-to-call election? Also, a new online magazine in France is designed to give voice to Muslim women. Plus, an Iranian American astronomer whose passion for the stars was sparked when she was just 7.