It took a CBS News crew more than 14 hours to drive south from Turkey to Tehran, a nearly 600-mile trip made longer by checkpoints and bad roads.

President Donald Trump compared the American airstrikes on Iranian nuclear facilities to the only use of atomic weapons in warfare during the 20th century.

The fast-changing war between Israel and Iran, in which the U.S. recently inserted itself by targeting Iran’s nuclear sites, has caused a mix of emotions — including fear and uncertainty — among many in the Iranian diaspora in America and also showcased differences of opinion over the country’s future.