Giant ice disk forms in Maine river, enthralling residents

In our NewsHour Shares moment of the day, an unusual phenomenon has appeared in a river in Westbrook, Maine: A giant ice disk that spans about 100 yards across and spins counter-clockwise. The disk is a natural although uncommon occurrence documented in other parts of North America as well as in Scandinavia. Julia Griffin, in collaboration with Maine Public Television, has the story.