On the two-decade anniversary of the U.S. invasion, Iraq is weakly governed, leaving it prone to instability and meddling by neighbors—especially Iran.

Wars are fought not only on the battlefield but also in domestic political debates and in histories written after the fact. In the case of the US invasion of Iraq 20 years ago, we are still in this final phase, seeking an elusive consensus about the war’s legacy.

The U.S. military detention center at Guantanamo Bay, Cuba, has generated intense debate for two decades, raising enduring questions about national security, human rights, and justice.

The Time is Ripe to Reset U.S.-Saudi Relations.

Rekindling the nuclear deal with Tehran will solve one regional problem—and cause others.