Now scientists peering below the surface have uncovered the first evidence of underground channels apparently created by flooding a finding that's expected to further illuminate the role of water in Mars' history.
At the disaster site, Giuliani said, workers were proceeding carefully to ensure the giant sea wall surrounding the underground levels of the World Trade Center complex was not in danger of flooding.
They chalked up their problems in the New York area to devastating flooding that, in addition to knocking out power, disabled backup generators and disrupted the underground cables that carry calls, texts and Web searches from cell towers back to the main networks.