National Security Videos
Mueller inquired about Comey and Flynn firings: Sources
Special counsel Robert Mueller sent a letter to the White House about the firings of former FBI Director James Comey, National Security Adviser Michael Flynn and an Oval Office meeting with Russian diplomats, sources told ABC News.
Law enforcement experts on the impact of social media on crime, terrorism and national security
Good morning everyone I'm on in his eyes thanks for being with us today we are at Rutgers University live. For an incredible moderated discussion we're really pleased to host on social media crime and terrorism. And national security the Easter of course stories we've been covering many times over
Trump says he has made a decision on Iran nuclear deal
Iranian President Hassan Rouhani said it would be a "great pity" if the agreement is "destroyed by rogue newcomers to the world of politics."
Trump makes his first appearance at UN
The president called for reforms at the decades-old intergovernmental organization.
Trump will speak at UN amid Iran deal controversy, North Korea tensions
Delegates will be listening for a diplomatic option for handling North Korea.
National Security Adviser McMaster says White House 'looking at' new travel ban
White House National Security Adviser Lt. Gen. H. R. McMaster tells George Stephanopoulos a new travel ban is something the Trump administration is "looking at."
UK threat level raised to critical after terror attack
One arrest has been made but investigators are still hunting for more suspects in the London subway bombing.
'The Briefing Room': London terror attack
ABC News political until breaks down Friday's White House press briefing on the recent attack at the London tube, North Korea's missile test, and more.
North Korean missile launch over Japan
North Korea launched another missile over Japanese airspace last night, marking the second flyover in a month.
Trump doubles down on blaming 'both sides' for Charlottesville violence
"The View" co-hosts discuss the president's recent comment that there was "pretty bad dudes on the other side also."