ISIS has prompted the U.K. to raise its terror threat alert to the second highest level - "severe."
Authorities say an attack by the terror group is "highly likely."
Now, a report from Foreign Policy is shedding new light on what the terror group may be planning.
Reporters at the magazine say they have gained access to a laptop from an ISIS hideout in Syria. They are calling it "The Laptop of Doom."
More than 35,000 files were found on the computer and include specific instructions on how to develop biological weapons and weaponize the bubonic plague from infected animals. ISIS's advice: "Use small grenades with the virus, and throw them in closed areas like metros, soccer stadiums, or entertainment centers."
OutFront, Foreign Policy Contributor Jenan Moussa.