there are relatively few terror attacks that go beyond commercial-off-the-shelf compounds and almost none that do it well
The 2011 Norway attacks, 2002 Bali bombings, 2005 London underground bombings, 2008 Mumbai attacks... There is a long list of deadly terrorist attacks using homemade explosives, I don't think this is something to be dismissed.
There is a long list of deadly terrorist attacks using homemade explosives
But they used well-known and readily available compounds. They don't attempt to use novel ones. It would just make the attack way more difficult to execute.
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The 2011 Norway attacks, 2002 Bali bombings, 2005 London underground bombings, 2008 Mumbai attacks... There is a long list of deadly terrorist attacks using homemade explosives, I don't think this is something to be dismissed.
But they used well-known and readily available compounds. They don't attempt to use novel ones. It would just make the attack way more difficult to execute.