Authorities at a Pentagon mail screening facility found two envelopes suspected of containing ricin, a poison made from castor beans, and turned them over to the FBI for further analysis, authorities said Tuesday. 

President Trump and several top White House officials deny saying many of the quotes that appear in Bob Woodward's new book on the Trump administration. 

President Trump joined Americans across the country as they commemorate Memorial Day on Monday, honoring the "lives and deeds of America's greatest heroes."

President Trump: U.S. has "launched precision strikes" on targets associated with Syrian chemical weapons program. 

President Trump's New Year's Day lambasting of Pakistan on Twitter has drawn an angry response on the streets and an official summoning of the U.S. ambassador in Islamabad to demand an explanation. 

President Trump unveiled a new national security strategy Monday afternoon. 

North Korea said Wednesday it had successfully launched a new type of intercontinental ballistic missile (ICBM), which it claimed is capable of reaching the United States.

North Korea has launched a ballistic missile, the Pentagon confirmed Tuesday. 

Defense Secretary James Mattis says the U.S. Army "must stand ready" in the face of continued provocations by the North Korean regime.  

South Korea's Defense Ministry said Monday that North Korea appeared to be planning another missile launch, possibly of an ICBM, to show off its claimed ability to target the United States with nuclear weapons, though it was unclear when it might happen. 

The top U.S commander for the Middle East says the first deployments of new U.S. forces will arrive in Afghanistan "pretty quickly.'" 

President Trump addressed the nation Monday night from Fort Myer in Arlington, Virginia, about the path forward for U.S. engagement in Afghanistan, which is where America has been fighting its longest-running war.