The figures vary from as few as 3,000 according to the regime in Tehran to over 32,000 reported by President Donald Trump.

The military options are the latest signs that the United States is preparing for a serious conflict with Iran should diplomatic efforts fail.

U.S. military buildup in Persian Gulf intensifies as Trump deploys naval force near Iran. Aircraft carriers and destroyers position for potential strikes.

By Samia Nakhoul, Parisa Hafezi and John Irish DUBAI, Feb 20 (Reuters) - Iran and the United States are sliding rapidly towards military conflict as hopes fade for a diplomatic solution to their standoff over Tehran’s nuclear programme,

Tensions between the United States and Iran have caused an increase in oil prices across the country and here in New Jersey, according to experts.

President Trump has warned Iran that an attack would be "far worse" than the U.S. airstrikes that targeted its nuclear facilities last June.

In a room of 1,500 men, Sara Shahverdi becomes the only female leader in her region of Iran - a new film joins her as she pushes for change.

President Trump is pressuring Iran to either curtail its nuclear program or face military strikes, after Iran amassed a large stockpile of highly enriched uranium. Here's what to know.

The oil market's biggest fear is that a conflict between the U.S. and Iran could lead to a prolonged disruption of oil flows through the Strait of Hormuz.

Trump's new threat came a day after he appeared to give Iran about 10 days to agree to a deal to curb its nuclear programme.