New Gambian Leader Takes Offices in Senegal

Adama Barrow becomes President of the Gambia in Dakar after Yahya Jammeh refuses to step down; Donald Trump arrives in Washington ahead of his inauguration; Scientists say they're closer to understanding how ants navigate, and how that might apply to navigation in cars.

(Photo: Supporters of Gambia's new President Adama Barrow gather outside of the Gambian Embassy in Dakar on January 19, 2017. Credit: Getty Images)