The following are some of the key exchanges between Senator Joe Biden and Alaska Governor Sarah Palin, in their only vice-presidential debate.
Palin: We know that it's real. I'm not one to attribute every man - activity of man to the changes in the climate. There is something to be said also for man's activities, but also for the cyclical temperature changes on our planet. But there are real changes going on in our climate. And I don't want to argue about the causes.
Biden: I think it's clearly man-made. And, look, this probably explains the biggest fundamental difference... If you don't understand what the cause is, it's virtually impossible to come up with a solution. We know what the cause is. The cause is man-made... That's why the polar icecap is melting.
Biden: The fact of the matter is that under the constitution, same-sex couples should be able to have visitation rights in the hospitals, joint ownership of property, life insurance policies, et cetera... In an Obama-Biden administration, there will be absolutely no distinction from a constitutional standpoint or a legal standpoint between a same-sex and a heterosexual couple... Barack Obama nor I support redefining from a civil side what constitutes marriage."
Palin: I am tolerant... but in that tolerance also, no-one would ever propose, not in a McCain-Palin administration, to do anything to prohibit, say, visitations in a hospital... But I will tell Americans straight up that I don't support defining marriage as anything but between one man and one woman.
Palin: Now, what I've done as a governor and as a mayor is I've had that track record of reform. And I've joined this team that is a team of mavericks with John McCain... We're known for putting partisan politics aside to just get the job done... We're tired of the old politics as usual. Oh, yeah, it's so obvious I'm a Washington outsider.
Biden: I haven't heard how [McCain's] policy is going to be different on Iran than George Bush's. I haven't heard how his policy is going to be different with Israel than George Bush's. I haven't heard how his policy in Afghanistan is going to be different than George Bush's. I haven't heard how his policy in Pakistan is going to be different than George Bush's... And you know where that policy has taken us.
Biden: John McCain and Dick Cheney said while I was saying we would not be greeted as liberators, we would not... John McCain was saying the Sunnis and Shias got along with each other without reading the history of the last 700 years. John McCain said there would be enough oil to pay for this. John McCain has been dead wrong.
Palin: Your plan is a white flag of surrender in Iraq and that is not what our troops need to hear today, that's for sure. And it's not what our nation needs to be able to count on. You guys opposed the surge. The surge worked. Barack Obama still can't admit the surge works.
WAR ON TERROR
Palin: There have been huge blunders in the war. There have been huge blunders throughout this administration, as there are with every administration.
Biden: John continues to tell us that the central war in the front on terror is in Iraq. I promise you, if an attack comes in the homeland, it's going to come... from al-Qaeda planning in the hills of Afghanistan and Pakistan. That's where they live.
Biden: Pakistan already has nuclear weapons. Pakistan already has deployed nuclear weapons. Pakistan's weapons can already hit Israel and the Mediterranean. Iran getting a nuclear weapon would be very, very destabilising... So they're both very dangerous. They both would be game-changers.
Palin: An armed, nuclear-armed, especially Iran, is so extremely dangerous to consider... Iran claiming that Israel, as he termed it, a stinking corpse, a country that should be wiped off the face of the Earth. Now a leader like Ahmadinejad, who is not sane or stable, when he says things like that, is not one whom we can allow to acquire nuclear weapons.
Palin: A two-state solution is the solution... Israel is our strongest and best ally in the Middle East... building our embassy, also, in Jerusalem, those things that we look forward to being able to accomplish with this peace-seeking nation. I can promise you, in a McCain-Palin administration, that commitment is there to work with our friends in Israel. I'm so encouraged to know that we both love Israel.
Biden: It has been an abject failure, this administration's policy... Here's what the president said when we said no. He insisted on elections on the West Bank, when I said, and others said, and Barack Obama said: "Big mistake. Hamas will win. You'll legitimise them." What happened? Hamas won.
FEELING VOTERS' PAIN
Biden: Look, I understand what it's like to be a single parent. When my wife and daughter died and my two sons were gravely injured, I understand what it's like as a parent to wonder what it's like if your kid's going to make it. I understand what it's like to sit around the kitchen table with a father who says, "I've got to leave, champ, because there's no jobs here."
Palin: Being a mom, one very concerned about a son in the war, about a special needs child, about kids heading off to college, how are we going to pay those tuition bills? About times... in our past where we didn't have health insurance and we know what other Americans are going through as they sit around the kitchen table... I've been there. I know what the hurts are.
Biden: Two years ago Barack Obama warned about the sub-prime mortgage crisis. John McCain said shortly after that, in December, he was surprised there was a sub-prime mortgage problem. We let Wall Street run wild... John McCain thought the answer is that tried-and-true Republican response, deregulate, deregulate.
Palin: Darn right it was the predator lenders, who tried to talk Americans into thinking that it was smart to buy a $300,000 house if we could only afford a $100,000 house. There was deception there, and there was greed and there is corruption on Wall Street... I think we need to band together and say never again.