Obviously most of the group did not have any real plans. But some did. There were explosives planted, maps of underground escape routes, zip ties for taking pri

Obviously most of the group did not have any real plans. But some did. There were explosives planted, maps of underground escape routes, zip ties for taking prisoners, chat messages planning and coordinating, and I suspect much more that is not released yet due to the ongoing investigations. Looks like a dead ringer for the definition to me. It doesn't have to be -well- planned or likely to succeed.