The fall of the Berlin Wall 20 years ago marked a triumph of the U.S. strategy of containment. But U.S. policymakers have been struggling to establish new guidelines for confronting the world’s compl…

This year’s daunting UN challenges for President Obama: navigating the Palestinian statehood thicket and convincing Americans that UN diplomacy matters, writes CFR’s Stewart Patrick.

The G8 summit affirmed the group’s importance as a U.S. partner as it seeks a common front on the "Arab Spring" uprisings, and in forging collective action on human rights and security matters, says …