Kate Leinbaugh

Do you have a sense of whether these attacks go all the way up to Vladimir Putin?

Do you have a sense of whether these attacks go all the way up to Vladimir Putin?

When asked by the Wall Street Journal about various attacks, the Kremlin has denied involvement. In one case, it called the accusation absurd and unsubstantiated. European authorities have investigated these attacks and charged some of the individuals involved. But Boyan says the European public generally isn't aware of this shadow war.

When asked by the Wall Street Journal about various attacks, the Kremlin has denied involvement. In one case, it called the accusation absurd and unsubstantiated. European authorities have investigated these attacks and charged some of the individuals involved. But Boyan says the European public generally isn't aware of this shadow war.

When asked by the Wall Street Journal about various attacks, the Kremlin has denied involvement. In one case, it called the accusation absurd and unsubstantiated. European authorities have investigated these attacks and charged some of the individuals involved. But Boyan says the European public generally isn't aware of this shadow war.

But that stance shifted after a brazen attempt to start fires on airplanes. That's next. Following that tip, Boyan got at the hotel bar proved to be a challenging assignment. It would take months of reporting. He spoke with European investigators, watched security camera footage, and reviewed photographic evidence. This is what he found.

But that stance shifted after a brazen attempt to start fires on airplanes. That's next. Following that tip, Boyan got at the hotel bar proved to be a challenging assignment. It would take months of reporting. He spoke with European investigators, watched security camera footage, and reviewed photographic evidence. This is what he found.

But that stance shifted after a brazen attempt to start fires on airplanes. That's next. Following that tip, Boyan got at the hotel bar proved to be a challenging assignment. It would take months of reporting. He spoke with European investigators, watched security camera footage, and reviewed photographic evidence. This is what he found.

The incidents happened at two warehouses of the German shipping giant DHL. At those locations, packages are put in big crates to be sent on airplanes around the world. In July, at a DHL warehouse in Germany and one in the UK, packages destined for North America caught on fire. Boyan watched a video showing a forklift moving one of these crates.

The incidents happened at two warehouses of the German shipping giant DHL. At those locations, packages are put in big crates to be sent on airplanes around the world. In July, at a DHL warehouse in Germany and one in the UK, packages destined for North America caught on fire. Boyan watched a video showing a forklift moving one of these crates.

The incidents happened at two warehouses of the German shipping giant DHL. At those locations, packages are put in big crates to be sent on airplanes around the world. In July, at a DHL warehouse in Germany and one in the UK, packages destined for North America caught on fire. Boyan watched a video showing a forklift moving one of these crates.

Both fires were contained. And Boyan learned that the devices that caused them were concealed in ordinary back massagers, the kind that are shaped like a little cushion for your lower back. But investigators found that these ones were stuffed with magnesium. What's significant about magnesium?

Both fires were contained. And Boyan learned that the devices that caused them were concealed in ordinary back massagers, the kind that are shaped like a little cushion for your lower back. But investigators found that these ones were stuffed with magnesium. What's significant about magnesium?

Both fires were contained. And Boyan learned that the devices that caused them were concealed in ordinary back massagers, the kind that are shaped like a little cushion for your lower back. But investigators found that these ones were stuffed with magnesium. What's significant about magnesium?

Is there any way to detect these devices?

Is there any way to detect these devices?

Is there any way to detect these devices?

After these incendiary devices caught fire, a multinational investigation was launched in Europe.

After these incendiary devices caught fire, a multinational investigation was launched in Europe.

After these incendiary devices caught fire, a multinational investigation was launched in Europe.