Who was the first U.S. President to resign from office?

Richard Nixon

In "Inside Out", what’s the name of Riley’s imaginary friend? What fictional African country is home to the superhero Black Panther? Which major WWII battle in 1945 was fought on the volcanic island famous for the raising of the U.S. flag? Which inventor is credited with inventing the light bulb? What is the largest cat breed in the domestic world?