From 2000 to 2009, the AFL had its own developmental league, the <answer>af2</answer>. The AFL played 22 seasons from 1987 to 2008; internal issues caused the league to cancel its 2009 season, though the <answer>af2</answer> did play. Later that year both the AFL and <answer>af2</answer> were dissolved and reorganized as a new corporation comprising teams from both leagues, and the AFL returned in 2010. The Arena Football League has its headquarters in Chicago, Illinois.
What was the name of the AFL development league?
af2