>>509055517 (OP) Suitcase nuke and refusing to sign nuclear peace treaties. Israel is not a signatory since they want to keep the option of killing everyone on the table.
>>509055517 (OP) Open floor concept, the design of the World Trade Centers was made to to maximize floor space and provide uninterrupted views (until they put cubicles in everywhere).
The exterior of the building was the support, the core was there to provide utilities / elevators.