[InterceptPoint]

Your talking very complicated design. Could the two brothers have figured that complex design on their own? I bet not.
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Not if JRanomFreeper is right and I’m thinking he is. The controller design was done by the the Toy manufacturer and the adaption to the pressure cooker bomb really isn’t that hard. You have to assume that the bomb design using the toy controller was figured out by some clever Jihadist and the Mad Bombers just put theirs together like a Heathkit.

[JRandomFreeper]

There are ham radio operators in the middle east. I worked JY1 once on a special link, back before he died.

/johnny