“It was like a war. People were disappearing and you didn’t know where they went.” That may sound like hyperbole to some, but for John Pavey, the CTO of The Huffington Post, Hurricane Sandy brought back memories of 9/11. Pavey, who is based in Princeton, N.J., pulled an all-nighter during the storm on Monday night as the AOL news site suffered an unprecedented outage. By Tuesday morning, HuffPo was back up and running even though the ISP responsible — DataGram — wasn’t functioning.