Who was the first African American to serve as Chairman of the Joint Chiefs of Staff?

Colin Powell

In "Groundhog Day," Phil Connors relives the same day repeatedly in which town? Which actress portrayed Katniss Everdeen in "The Hunger Games" movies? Who is Monica and Ross's mother? Which team has appeared in the most Super Bowls? What is Leonardo da Vinci's famous sketch of the proportions of the human body called?