Foreign Policy has an in-depth look at the contents of a laptop reportedly seized this year in Syria from a stronghold of the organization now known as the Islamic State, and described as belonging to a Tunisian national ("Muhammed S."). The "hidden documents" folder of the machine, says the report, contained a vast number of documents, including ones describing and justifying biological weapons: The laptop's contents turn out to be a treasure trove of documents that provide ideological justifications for jihadi organizations -- and practical training on how to carry out the Islamic State's deadly campaigns. They include videos of Osama bin Laden, manuals on how to make bombs, instructions for stealing cars, and lessons on how to use disguises in order to avoid getting arrested while traveling from one jihadi hot spot to another. ... The information on the laptop makes clear that its owner is a Tunisian national named Muhammed S. who joined ISIS in Syria and who studied chemistry and physics at two universities in Tunisia's northeast. Even more disturbing is how he planned to use that education: The ISIS laptop contains a 19-page document in Arabic on how to develop biological weapons and how to weaponize the bubonic plague from infected animals. ... "The advantage of biological weapons is that they do not cost a lot of money, while the human casualties can be huge," the document states.