James M. Lindsay argues that while the United States remains the most significant military, diplomatic, and economic power in a changing geopolitical environment, it faces increasing difficulty in driving the global agenda.

Despite international pressure, Iran appears to be continuing its march toward getting a nuclear bomb.

America Unbound argues that President Bush has redefined how America engages the world, shedding the constraints that friends, allies, and international institutions have traditionally imposed on its freedom, insisting that an America unbound is a more secure America.

A preview of world events in the coming week from CFR.org: Secretary of State Clinton visits Turkey; the Organisation of Islamic Cooperation convenes in Mecca; the UN's Clean Development Methodology Panel meets in Bonn; and Puerto Rico holds a referendum on its political status.

A preview of world events in the coming week from CFR.org: Congress rises for summer recess; violence continues in Syria; the anniversary of Hiroshima's atomic bombing is marked; and NASA's Curiosity rover lands on Mars.

A preview of world events in the coming week from CFR.org: U.S. presidential candidate Mitt Romney visits Great Britain, Israel, and Poland; Mercosur holds a special summit in Rio; countries convene in the United States over the EU's Emissions Trading System; and Apple and Samsung face off over patents.

A preview of world events in the coming week from CFR.org: Secretary of State Hillary Clinton visits Egypt; India holds presidential elections; the EU and IMF visit Hungary; and the UN Security Council debates Somalia.

A preview of world events in the coming week from CFR.org: World powers convene in Geneva for a crisis meeting on Syria; Mexico holds presidential elections; and the U.S. House and Senate go into recess.

A preview of world events in the coming week from CFR.org: The presidential election runoff takes place in Egypt; nuclear talks between Iran and the P5+1 resume; and the G20 and Rio+20 summits convene.

A preview of world events in the coming week from CFR.org: The U.S.-India Strategic Dialogue takes place in Washington; The U.S. House Rises for Recess; And the International Criminal Court Hears submissions for sentencing in the Lubanga case

A preview of world events in the coming week from CFR.org: the UN Human Rights Council holds a special session on Syria; the IAEA board of governors meets in Vienna; and the Shanghai Cooperation Organization Summit convenes.

A preview of world events in the coming week from CFR.org: Ireland holds a referendum on the EU's new fiscal treaty; the UN Security Council debates Yemen; UN climate talks convene in Bonn; and Memorial Day is marked.

A preview of world events in the coming week from CFR.org: Presidential elections take place in Egypt; the NATO summit convenes in Chicago; and Iran and P5+1 nuclear talks take place in Baghdad.

A preview of world events in the coming week from CFR.org: The IAEA resumes nuclear talks with Iran; G8 summit convenes at Camp David; Francois Hollande is inaugurated as France's new president; And the Cannes film festival opens.

A preview of world events in the coming week from CFR.org: The second round of presidential elections takes place in France; Vladimir Putin is sworn into office as new president of Russia; North Korea plans a third nuclear test; and Secretary Clinton visits Bangladesh and India.

A preview of world events in the coming week from CFR.org: The one-year anniversary of Osama Bin Laden killing is marked; the fourth round of U.S.-China Strategic Economic Dialogue takes place in Beijing; the UN's Ban Ki-moon visits Myanmar; and Vietnam marks Liberation Day.

A preview of world events in the coming week from CFR.org: France holds its presidential election; the funeral of Malawian President Mutharika is held; the Chernobyl disaster passes its twenty-sixth anniversary; and Earth Day is marked.

CFR's James M. Lindsay remembers the Bay of Pigs invasion, which began on April 17, 1961, and discusses the importance of preparing for failure and planning accordingly.

A preview of world events in the coming week from CFR.org: North Korea plans a controversial satellite launch; the Summit of the Americas convenes in Colombia; and the IMF and World Bank hold spring meetings.

CFR's James M. Lindsay remembers President Harry Truman's announcement on April 11, 1951, that he had dismissed General Douglas MacArthur as commanding general of U.S. forces in Korea, and discusses the principle of civilian control of the military.

CFR's James M. Lindsay remembers the signing of the North Atlantic Treaty in Washington, DC, on April 4, 1949, and discusses the difficulty inherent in pursuing fundamental changes to a nation's foreign policy.

A preview of world events in the coming week from CFR.org: The United States takes over the UN Security Council presidency; World Bank nominee Jim Yong Kim embarks on a world tour; and by-elections are held in Myanmar.

CFR's James M. Lindsay remembers President Lyndon B. Johnson's announcement on March 31, 1968, that he would not seek reelection, and discusses the damage that foreign policy can do to a presidency.