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

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.

Trump gives Iran 10-15 days to negotiate or face serious military consequences in high-stakes nuclear diplomacy standoff with Tehran regime officials.

Within days of the U.S. strikes on Iran’s nuclear facilities last year, all sides agreed to a cease-fire. This time could be different.

Marco Rubio and his U.K. counterpart will discuss an apparent disagreement over the use of U.K. bases Trump says "may be necessary for" an attack on Iran.

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.

Report says US might allow Tehran 'token' nuclear enrichment, but gaps between sides widely seen as irreconcilable; Congress may vote on curtailing Trump's ability to strike The post Israeli officials believe US,

U.S. forces surge into the Middle East amid Iran tensions, drawing comparisons to 2003 Iraq buildup. Military experts say intent differs fundamentally.