Andrea Mitchell

Preparing the lone available site for testing would require hundreds of millions of dollars and at least two years, nuclear experts said.

The United Kingdom has stopped sharing intelligence on suspected drug smuggling boats in the Caribbean because of concerns about the legality of

The secretary of state already had three jobs in the Trump administration before becoming the face of President Trump's efforts to “run” Venezuela.

The State Department announced it will be releasing a limited series of passports this summer containing an image of the president inside the front cover.

Saudi Arabia, a key Gulf ally, suspended the U.S. military's ability to use its bases and airspace to carry out the operation, sources say. The White House said the administration notified Middle East allies in advance.

U.S. officials believe the regime could fall by the end of the year, but that timeline isn't fast enough for the president, sources say. The White House says Cuba has rejected humanitarian and economic assistance to stabilize.

The two leaders will discuss a U.S.-China trade board and agreements on aerospace, agriculture and energy, though aides say no comprehensive deal is on the table.

The two leaders are expected to discuss trade, the Iran war and Taiwan. 0 seconds of 17 minutes, 40 seconds Volume 0% By NBC News

In his remarks earlier today, Xi referred to the Thucydides Trap, a theory popularized by Harvard scholar Graham Allison that suggests a high risk of war between an emerging and an established power.

President Donald Trump has sought to exert control over the Smithsonian Institution and its museums, particularly as it relates to slavery and other dark periods in the nation's past.