The White House confirmed that the president sent a letter, but would not reveal its contents.
The North Korean leader signaled Wednesday that his country could soon resume nuclear weapons testing. But Trump said he believes Kim is a "man of his word."
Putin described the Avangard hypersonic glide vehicle as a technological breakthrough comparable to the 1957 Soviet launch of the first satellite.
“The use of atomic energy for purposes of war is immoral — as is the possession of atomic weapons,” the pope declared at the Hiroshima peace memorial.
Iran announced it has begun using advanced centrifuges to enrich uranium.
The Axios journalist is standing by his reporting, but the president seems riled up that people might think he suggested bombing storms.
The energy secretary was among a number of high-profile public figures caught out by a fake post.
The Kremlin won’t say much about a blast at a secretive Russian nuclear reactor.
President Donald Trump's administration says Moscow is in violation of the Cold War-era Intermediate-range Nuclear Forces Treaty (INF).
More than 60 boxes of documents from an investigation into violations at Rocky Flats, a former nuclear weapons plant, have gone missing.
President Donald Trump met with Kim last month but has yet to hold any new talks in his effort to rein in North Korea's nuclear program.
Sir Kim Darroch called Trump's actions "diplomatic vandalism," according to new cables obtained by the Daily Mail.
"You got to be honest about what it means to lead a country. It means killing people," the Fox News host said.
Watch as the late night comics mercilessly mock the president’s description of his decision to call off an attack on Iran.
The late night hosts roasted President Donald Trump’s “cocked and loaded” description of his decision to call off an attack on Iran.
President Trump and the North Korean dictator continue to praise each other months after their failed summit.
Xi is the first Chinese president to visit North Korea in 14 years.
During an exclusive interview with ABC News, President Donald Trump said he hopes North Korea isn’t building nuclear weapons.
Speaking to ABC News’ George Stephanopoulos, the president stressed his "very strong relationship" with the "very smart" Kim Jong Un.
At the root of the recent spike in tensions appears to be Trump’s decision a year ago to pull out of the nuclear deal.