Search Result: Recovery Operations

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Side-Scan Sonar Identifies N.Y. Crash Evidence

September 1, 2009

Side-scan sonar is known as a "towfish" — it's a torpedo-like device towed behind a boat. The towfish converts acoustic sound pulses into a video image of the river bottom. To a trained operator, the resulting image offers a photographic view of the bottom that can be used to identify items of interest.

9/11: Port Authority Police Department

September 1, 2002

Thirty-seven. That's how many New York/New Jersey Port Authority Police officers came to work on Sept. 11, 2001, and never went home. More than 2 percent of the agency's complement of 1,400 was killed in the attack, and to add insult to extreme injury, its headquarters were on the 67th floor of 1 World Trade Center.

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