Vice Presidential debate Biden, Ryan aggressive in debate Both push their views, challenge points in only debate ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page Eric Gay/Associated Press Joe Biden and Paul Ryan’s vice presidential debate on Thursday differed sharply from the first presidential debate. jeff haynes/REUTERS Biden and Ryan took part in a contentious discussion of foreign policy and domestic issues. rich wilking/reuters Ryan gestured while making a point during the debate. john gress/REUTERS Biden reacted as Ryan spoke during the debate. AFP/Getty Images The debate was characterized by lively exchanges between the political rivals. associated press The debate was seen as critical for both campaigns. AFP/Getty Images The debate began with a discussion on foreign policy. Kevin Lamarque/REUTERS The early discussion touched on the Sept. 11 attack in Libya and on efforts to keep Iran from developing nuclear weapons. Kevin Lamarque/REUTERS Vice President Joe Biden and US Representative Paul Ryan shook hands at the start of the debate. Kevin Lamarque/REUTERS Moderator Martha Raddatz of ABC News addressed the crowd before the start of the debate. eric gay/associated press Supporters rallied in Danville, Ky., site of tonight's vice presidential debate. Charlie Neibergall/associated press The debate was seen as critical to each party’s presidential ticket. Kevin Lamarque/REUTERS Hats were for sale outside the debate site. Chip Somodevilla/Getty Images A man displayed an anti-Obama sign near the debate site.