The presence of international terrorist groups may grow in the months and years ahead, but there are steps the United States can take to mitigate the risks.
The arrangement can be tense and transactional, but has provided benefits for both sides.
The United States will need to learn how to work with and around the influence of other powerful states.
The two countries are reportedly concluding a new partnership agreement, but cooperation between Tehran and Beijing will face obstacles.
The aggressive U.S. strategy has raised tensions in Iraq without creating prospects for a resolution.
The Hanau attack comes amid a wave of surging anti-Semitism and violence against newly arrived migrants in Germany.