Retired Admiral James Stavridis wants to remind us: Despite headlines about the rise of ISIS, there are bigger existential threats to America. "Terrorism is not apocalyptic, it's a tool," says Stavridis. He warns that conflicts with Russia and China are much more worrisome and likely to include a maritime component. "Again and again when there's a crisis, the first question from the president is, where are the [aircraft] carriers? They are flexible and they can strike." His new book is Sea Power.

In the Spiel, making a supergroup of the musicians in Trump's White House.

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