Greg Myre

Michael Flynn's contacts with Russia are a key part of the investigation into whether there was collusion during the presidential campaign. Here's the irony: Flynn often described Russia as an enemy.

There's been a lot happening in Washington on the imbroglio involving Trump, Russia and the FBI. Reuters reports there were more contacts between Trump aides and Russia than previously disclosed. The New York Times reports Trump's camp was warned before the fact that Michael Flynn was under investigation, and the deputy attorney general briefed senators about all of this on Thursday.

Given the president's campaign rhetoric, Saudi Arabia seems an odd choice for his first foreign visit. But the kingdom plans a warm welcome and has invited leaders from many other Muslim countries.

President Trump asked James Comey to stop investigating Michael Flynn, according to a memo Comey wrote. And Israeli columnist Chemi Shalev discusses Trump sharing intelligence with Russians.

Reports suggest President Trump revealed classified information about ISIS to Russian officials at a White House meeting. A view from Iran ahead of the country's presidential election later this week.

President Trump is calling on North Korea to relinquish its nuclear arsenal. History suggests that's unlikely. Only one country has built its own nukes, and then given them up.

Warlord Gulbuddin Hekmatyar rained rockets on the Afghan capital in the 1990s and was responsible for thousands of deaths. The country's president welcomed him back Thursday in the interest of peace.

The Islamic State keeps losing ground. But defeat in the Middle East would not mean the end of ISIS. U.S. counterterrorism officials are already thinking about what's likely to come next.

What's the most serious threat to the U.S. — a resurgent Russia, Islamic State terrorism, a nuclear Iran? Maybe it's none of the above. It could be something called the Thucydides trap.

Secretary of State Rex Tillerson tells Congress that the Trump administration will take another look at sanctions to see if lifting them was in line with U.S. national security interests.

President Trump's national security decision making style is becoming clear early in his administration, and it's quite a change from his predecessor. Trump has empowered his top military commanders in new ways and felt free to reverse himself on major positions.

U.S. presidents have a tradition of entering office and expressing hope for improved relations with Russia. This is matched by a tradition of presidents leaving office amid friction with Moscow.

The U.S. has now bombed both main players in the Syrian war: President Bashar Assad's military and the Islamic State. But the Trump administration hasn't spelled out what sort of outcome it's seeking.

During a joint press conference at the White House with King Abdullah of Jordan on Wednesday, President Trump refrained from using the term "radical Islamic terrorism" to describe ISIS.

The U.S. was a reluctant entrant into World War I. But when America joined the battle 100 years ago, on April 6, 1917, it transformed a small military in a major international force almost overnight.

The war is remembered for trench warfare, millions of deaths and the failure to bring lasting peace. But it also brought together emerging technologies, remaking life on and off the battlefield.

Authorities are learning more about the man who attacked Westminster Bridge and the Houses of Parliament in London this week. The attack corresponds closely with instructions provided by ISIS' propaganda magazine, which details which kinds of vehicles to use and even which kinds of knives to use — and not use — in these types of terror attacks.

An attacker killed three people and injured dozens in London Wednesday. The nature of the attack is similar to previous such ones in the U.S., Europe and the Middle East.

The United Kingdom has joined the U.S. in restricting large electronics from being carried on flights that depart airports in certain Middle Eastern and North African countries. Security officials won't explain precisely why they have ordered the restrictions, but it's thought there could be dangers associated with laptops or other such devices being used as weapons.

Passengers on flights from the region coming into the U.S. and Britain cannot carry any devices larger than a smartphone. Laptops, tablets and cameras must all be placed in checked baggage.