Taking a closer look at how the decision was made for President Obama to win the Nobel Peace Prize, we talk again with Paul Martin, professor and director for Human Rights Studies at Barnard Colleage at Columbia University. We also talk with John Bolton, former U.S. Ambassador to the U.N., who served under President George W. Bush.

Yesterday President Obama announced that he is scrapping the Bush administration's plans for a land-based missile defense system in Poland and the Czech Republic. He's opting instead to focus on a defense system that would intercept shorter-range missiles from Iran. This move has upset Poland and the Czech Republic, but pleased Russia, who was against Bush's plan. Is this an intelligent decision based on new information about Iran's weapons? Or will it empower Russia and Iran at the expense of American allies? We speak to former U.S. Ambassador John Bolton, who served under President Bush, and to Alexander Cooley, professor of International Relations and Foreign Policy at Barnard College. (Click through for a full interview transcript.)

Former Ambassador to the United Nations John Bolton joins us this morning to debate the proper way to interact with North Korea and the resurgence of former President Bill Clinton. Clinton returned to the national spotlight when he made a surprise trip to North Korea to negotiate the release of two American journalists held by the closed communist country. Even while the behind-the-scenes negotiations for the journalists release were happening, North Korea was testing missiles and escalating verbal tensions with Secretary of State Hillary Clinton. So what does Clinton’s trip do, if anything, for the nuclear issues at the heart of our country’s North Korean agenda? Ambassador Bolton has some strong opinions on that subject.

Click through for a transcript of this interview.

Today President Obama kicks off a week-long trip to Russia, Italy, and Ghana. He’s currently in Moscow, meeting with President Medvedev. Iran, North Korea, and plans for a U.S. missile defense system in Europe are all on the agenda, but reducing the number of strategic and other nuclear weapons gets top billing. Presidents Obama and Medvedev aim to negotiate a new pact to replace the 1991 Strategic Arms Reduction Treaty, which expires in December. To gauge how effective this negotiation will be—and for a look at how this summit could redefine U.S.-Russia relations, we turn to Ambassador John Bolton. He is Former U.S. Ambassador to the United Nations. He is currently a senior fellow at the American Enterprise Institute.

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Just hours after the U.N. Security Council condemned North Korea's nuclear tests, Pyongyang tested more missiles. President Obama criticized the tests, prompting North Korea to respond that its "army and people are fully ready for battle... against any reckless U.S. attempt for a pre-emptive attack."

An American attack is extremely unlikely. But what clout does the U.S. or the international community have? The Takeaway turns to John Bolton: he served as the Permanent U.S. Ambassador to the United Nations from August 2005 until December 2006 and is currently a Senior Fellow at the American Enterprise Institute.

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In case you missed the President's remarks on North Korea, here they are: