President Donald Trump is threatening military action in Iran – including airstrikes – to stop a brutal crackdown on antigovernment protests that has killed as many as 500 people.

Iranian officials said Jan. 12 that the country is prepared for war but also open to dialogue with the United States.

Trump is expected to review options for Iran with senior advisers Jan. 13. Possibilities include military strikes, cyber attacks and increased sanctions, according to The Wall Street Journal.

"The military is looking at it, and we're looking at some very strong options," Trump told reporters traveling on Air Force One Jan 11.

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