Tillerson ended his weeklong trip to Latin America on Wednesday. Was he able to rally support around Trump's policies in the region?
He said that he doesn't know in advance if or when Trump plans to tweet.
The United States doesn't conduct business with North Korea directly, but could sanction those who do.
The country has routinely denied involvement in cyber attacks against other countries.
The 22-year-old University of Virginia student was sentenced to 15 years’ hard labor.