On Sunday, North Korea launched a long-range rocket, defying foreign pressure to restrain from what critics are calling a violation of its 2006 U.N. sanctions. After a week of economic and foreign policy meetings between American and European leaders, the launch served as grim reminder that "rogue states" outside the international system are still sending messages of their own.
For more history, leaders' responses, and world reactions to the first foreign-policy crisis of the Obama administration, visit today's TNR slideshow.
--Katie Koch