As the U.S. and Israel back Iranians' right to protest against their leaders, authorities in Tehran detain students and declare a sudden holiday.

Iran is reportedly developing chemical and biological warheads for its long‑range ballistic missiles, accelerating its deterrence program amid rising tensions with Israel and the U.S., according to media reports citing military officials. Newsweek has reached out to the U.S. State Department for comment.

Israel conflict grow as widespread protests put the Iranian regime under pressure. Israeli officials worry Tehran may attack as a last resort amid internal unrest and US warnings

Pezeshkian is ramping up rhetorical attacks on what he sees as unfairly repressive measures emanating from Washington and its allies.

President Donald Trump warned Iran against reconstituting its nuclear program Monday as he welcomed Israeli Prime Minister Benjamin Netanyahu to his home in Florida for wide-ranging talks.

"Now I hear that Iran is trying to build up again," Trump said. "And if they are we're going to have to knock them down."

Israeli officials say Tehran’s efforts to rebuild its ballistic-missile program could trigger new military action, complicating U.S. efforts to stabilize the region.

Israel and Iran have different strengths, reflecting their different priorities. Iran leverages its vast natural resources and manpower, while Israel excels in advanced technology and strategic defense systems.

On Tuesday's "The Record with Greta Van Susteren," Prime Minister of Israel Benjamin Netanyahu praised President Trump's support against Iran and its proxies. Netanyahu claimed Iran is "in cahoots" with Nicolas Maduro in Venezuela and suggested they are sending weapons to the South American nation.