In what year was the National Football League policy spearheaded by Dan Rooney established?
Dan Rooney: Daniel Milton Rooney (July 20, 1932 – April 13, 2017) was chairman of the Pittsburgh Steelers, an American football team in the National Football League (NFL), and son of the Steelers' founder, Art Rooney. Dan Rooney:  He was credited with spearheading a requirement that NFL teams with head coach and general manager vacancies interview at least one minority candidate, which has become known as the "Rooney Rule". Rooney Rule: The Rooney Rule is a National Football League policy that requires league teams to interview minority candidates for head coaching and senior football operation jobs. Rooney Rule:  It was established in 2003, and variations of the rule are now in place in other industries.
2003