Iran poses an acute threat to oil infrastructure across the Middle East, potentially allowing it to extort concessions from world powers.    

U.S. president struggling to squeeze tough deal out of Japan.

A second Brexit vote remains the best option in a dizzyingly difficult situation.

The U.S. overthrow of the Taliban regime after the 9/11 attacks ushered in a massive nation-building project. Nine graphics show what changed in Afghanistan over the past two decades.

Evaluating the legacy of September 11, 2001.