"A systemic failure has occurred and I consider that totally unacceptable. There was a mix of human and systemic failure that contributed to this potential catastrophic breach of security."He meant "potentially catastrophic breach of security." Potential needs to be an adverb, because it modifies the adjective catastrophic. It shouldn't be an adjective, which makes it seem to modify the noun breach. It was a breach. If the bomb had gone off, it would have been catastrophic. That's where the potentiality lies.
Anyway, it's painful to see the scramble to get from Napolitano's "the system worked" to "totally unacceptable ... catastrophic breach."
And speaking of Napolitano's abysmal performance over the weekend... where's Hillary? Was she made Secretary of State for the purpose of hiding her away?