Sunni

Shiite-majority Iran is home to millions of Sunnis, including the Sunni imam who opened his door to NPR's Steve Inskeep in Tehran. "We live together nicely," he insists. But he must speak with care.

A cold war in the Middle East just turned a lot hotter. Saudi Arabia, a Sunni power, and Iran, a Shiite one, have long been bitter rivals, but always maintained diplomatic relations — until now.