A makeshift memorial to the victims of the terrorist attack in Barcelona. Police killed five men August 18 believed to have been involved.
AP Photo/Manu Fernandez
With terrorists striking again in Spain and in Finland, one cannot help but ask -- again -- why people want to follow the Islamic State. Some new theories are emerging.
Sheen Ibrahim, Kurdish fighter from the People’s Protection Units (YPG), walks together with other YPG fighters in Raqqa, Syria, June 16, 2017.
The US is doing so with increasing frequency around the world – most recently with Kurdish fighters in Syria. A scholar explains what can go wrong, and why this approach is likely to continue.
An Iraqi soldier inspects a train tunnel adorned with an Islamic State group flag in Mosul, Iraq.
AP Photo/Khalid Mohammed
An expert explains that such claims are probably more calculated and careful than you'd expect.
Iraqi soldiers gather near the remains of wall panels and colossal statues of winged bulls that were destroyed by Islamic State militants in the Assyrian city of Nimrud, late last year.
Islamic State has destroyed globally-significant sites in Iraq and Syria, but not as wanton acts of destruction. Instead, they are calculated political and religious attacks.
Cruise missile strike against Syria on April 7, 2017.
U.S. Navy/via AP
Was this a one-off intervention – or a sign that Trump will undertake more of an effort to undermine the Assad regime?
On his way to the White House, Jan. 20, 2017.
AP Photo/Andrew Harnik
Is Trump correct in asserting that NATO has outlived its utility? Or that NATO’s members enjoy a 'free ride' on the back of the US? A political scientist examines the evidence.
A vendor sells newspapers with the Arabic headline ‘Trump era’ in Cairo, Egypt on Nov. 10, 2016.
AP Photo/Amr Nabil
Could the president-elect and his secretary of state nominee Rex Tillerson adopt useful policies in the Middle East? A scholar sees some hopeful possibilities.
The world reacts to President-Elect Donald Trump.
AP Photo/Marco Ugarte
America appears as divided over key aspects of foreign policy as it is at home. So how does President-elect Trump hope to handle that divide, and what will be the major issues facing him?
Iraqi special forces soldier advancing toward Mosul, Iraq.
AP Photo/Khalid Mohammed
What happens to the Islamic State if it loses the battle for territory in Iraq and Syria? Here's a list of ways it might go down.
Trump during the Commander in Chief Forum.
Hillary Clinton and Donald Trump appeared in the 'commander-in-chief' forum this week. This roundup looks at what the experts have to say about our nation's biggest vulnerabilities.
A girl stands near fighters in Aleppo. August 7, 2016.
The survival of civilians seem forgotten in a new U.S. and Russian agreement to root out IS and other terrorists in Syria.
Orwell (tallest, centre) in Huesca, Spain in 1937.
Hoover Institution Archives/Harry Milton Papers
Comparisons of foreign volunteers in Syria to the International Brigades of Spain are apt, but not for the reasons you think.
The Promenade des Anglais July 17.
Nice is an elegant and striking city, set against the azure Mediterranean. But there is history and politics behind the waving palms.
The truck that ran into a crowd celebrating Bastille Day in Nice, France.
IS claims of responsibility for the Nice attack shouldn't be taken seriously until there's more proof cementing the connection.
Rome’s Trevi fountain lit up with the Belgian flag. Why do some violent acts prompt global artistic memorial, but not others?
From Tintin weeping to spotlit buildings, images are rapidly circulating on social media as a way of comprehending the Brussels bombings. But where was the cartoon for those who died in Ankara? Are some tragedies "ungrievable"?
A masked face but experts still have his voice to go on.
When facial recognition isn't possible, it's time to bring in the voice recognition experts.
After a missile hit in Damascus.
Why there's a slender -- a very slender -- chance for working out a settlement at upcoming talks in New York.
With drones and modern radar technology it's possible to target Islamic State's oil tankers – and strike at the heart of their income stream.
Your laptop needs you!
Cyberwarfare may be of growing importance, but some foes must be tackled with more low-tech weapons.
Cut from a different cloth: outgoing Ewa Kopacz (left) welcomes successor Beata Szydło into office.
With hardliners taking charge of the government and presidency in Warsaw, the migrant rhetoric is looking worrying. But how much will change in practice?