Thursday, September 20, 2007, 8:00-9:30 p.m. ET

Judy Woodruff moderates the first of two live debates among the major parties' presidential candidates. This forum, featuring Democratic presidential candidates, will be presented live from the Adler Theater in Davenport, Iowa. Confirmed participants:

Sen. Joe Biden
Sen. Hillary Clinton
Sen. Christopher Dodd
Sen. John Edwards
Gov. Bill Richardson

Note: The second forum, featuring Republican presidential candidates, will be presented live from the Orpheum Theater in Sioux City, Iowa on Thursday, October 25, 8:00-9:30 p.m. ET on PBS.