Over the past several months, the media has reported a number of high profile cases of people (Paul Manafort, Gen. Michael Flynn) and organizations (RT, formerly Russia Today) failing to register as “foreign agents.” Here is what you should know about foreign agents and the American laws that regulate their activities.

During a hearing on Wednesday, judges upheld the war crimes conviction for Slobodan Praljak, an ex-commander of Bosnian Croat forces. Upon hearing the verdict, Praljak said he was not a criminal and then drank from a bottle containing poison. Here is what you should know about war crimes.

Last week, Saudi Arabia accused Lebanon of declaring war against it because of aggression by the Iran-backed Lebanese Shiite group Hezbollah. Here’s what you should know about the terrorist group that acts as a “state within a state” in Lebanon.

On Tuesday, a 29-year-old Uzbek national used a truck in a terrorist attack in lower Manhattan, killing at least eight people and injuring a dozen more. Writings found at the scene of the attack indicate the attacker had pledged his allegiance to the Islamic State (ISIS).

Attorney General Jeff Sessions named the international gang MS-13 as a national priority for federal organized crime task forces. Here is what you should know about the group that has been called the “world’s most dangerous gang.”

Bangladesh is building one of the world’s largest refugee camps to house the hundreds of thousands of stateless Rohingya people fleeing Myanmar. Here’s what you should know about what the UN Refugee Agency calls the fastest-growing refugee emergency in the world today.

The U.S. Defense Department contains an inventory of roughly 7,100 nuclear warheads. About 4,760 are active, while approximately 2,340 warheads are retired, but still intact. The retired warheads are in storage and await dismantlement. Here is what you should know about nuclear weapons:

On September 24, Angela Merkel won a fourth term as chancellor of Germany. Here is what you should know about the most powerful woman in the world.

Spain is facing one the country’s biggest political crises in decades as the region of Catalonia is planning a vote on secession. Here is what you should know about the issue of Catalonian independence.