President Trump is threatening to use "overwhelming force" against Iran, after Tehran lashed out at the U.S. over the latest round of sanctions against the regime.

"Any attack by Iran on anything American will be met with great and overwhelming force. In some areas, overwhelming will mean obliteration," Trump tweeted.

Trump's comments come after weeks of escalating confrontations between the U.S. and Tehran, culminating in Iran's downing of a U.S. drone last week.

FedEx has been caught in the crossfire in the conflict between the Trump administration and China's Huawei Technologies. Now, the giant shipper is suing the U.S. Commerce Department to block the agency from enforcing export regulations against FedEx.

"FedEx is a transportation company, not a law enforcement agency," the company said in a statement announcing the lawsuit on Monday.

They are early-risers and hard-workers, they have a "talent for struggling through" and the determination that follows. Some are the first in their family to go to college — or even graduate from high school — and many are financially independent from their parents. They're often struggling to pay for rent, groceries and transportation while taking classes. And that means working while in school — in retail, on campus or even with a lawn care business.

A Florida prosecutor is deciding whether to pursue charges against a woman who turned in her husband's guns to local police while he was in jail on a domestic violence charge.

Humiliation. In China, it is a word laden with history and identity that is playing a role in the high-stakes trade war between the U.S. and China.

This month, I was visiting China with a small group of journalists for 10 days, and the word "humiliation" came up over and over again in conversations both public and private, in meetings with top government officials, university scholars, think tankers and corporate executives.