Secretary of Defense Mark Esper says he “didn’t see” any evidence to back up President Donald Trump’s claim that Iran was planning an “imminent” attack on multiple U.S. embassies.

During an interview on Sunday with CBS’ Margaret Brennan, Esper stood by Trump’s assessment that there “could’ve been” attacks against America’s embassies, which is why he dispatched U.S. forces to the Middle East to reinforce them. This led to Brennan challenging him, saying it seemed like he was pointing to an “assessment” instead of a “specific tangible threat with a decisive piece of intelligence.”

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