Ordinary Iranians have been responding to US President Donald Trump's threat to destroy Iran's power plants and bridges unless it opens the Strait of Hormuz.
Trump said in an expletive-laden post on social media on Sunday that "Tuesday will be Power Plant Day, and Bridge Day, all wrapped up in one, in Iran. There will be nothing like it!!!."
Iranian officials have mocked his 20:00 ET (01:00 BST Wednesday) deadline, with a presidential aide saying his "insults and nonsense" were out of "sheer desperation and anger".
The BBC has managed to talk to several Iranians - all opposed the current establishment - even though it is very difficult to contact people inside Iran due to an internet blackout imposed by the authorities more than five weeks ago.
Their names have been changed for their own safety.
