Hudson Mid-Air Collision

Rescue workers look for debris and possible survivors in the Hudson River Saturday, Aug. 8, 2009 in New York. A tour helicopter carrying five Italian tourists collided with a small plane Saturday over the Hudson River, and authorities believe all nine people aboard were killed.

A New York City Police helicopter hovers low over the Hudson River as it drops a police diver into the river, Saturday, Aug. 8, 2009, in New York.

Emergency workers look for debris and possible survivors in the Hudson River Saturday, Aug. 8, 2009.

A New York City Police helicopter hovers low over the Hudson River as it drops a police diver into the river, Saturday, Aug. 8, 2009, in New York.

Emergency service personnel work at the scene of a helicopter and plane crash on the Hudson River, Saturday, Aug. 8, 2009 in New York.

A splash rises from the Hudson River where a small plane carrying three people collided with a tour helicopter carrying about a half-dozen people Saturday, Aug. 8, 2009 sending debris into the Hudson River and onto the Hoboken, N.J., waterfront.

As boats search the Hudson River in the background, a policeman stands guard over a tire that lies in a street after a helicopter and airplane collided midair and fell into the river Saturday, Aug. 8, 2009, near Hoboken, N.J.

Emergency personnel help to transfer a body from one boat to another in the Hudson River as seen from Hoboken, N.J., Sunday, Aug. 9, 2009.

Emergency personnel, in boat on left, recover what appears to be a body from the Hudson River as seen from Hoboken, N.J., Sunday, Aug. 9, 2009.

The wreckage of a helicopter is lifted by crane from the Hudson River and placed on a boat as seen from Hoboken, N.J., Sunday, Aug. 9, 2009. Divers recovered a piece of a submerged helicopter and a fifth body Sunday as investigators searched the Hudson River for wreckage from the helicopter and a small plane that collided in midair, killing nine people.

Emergency personnel move what appears to be a body from the Hudson River as seen from Hoboken, N.J., Sunday, Aug. 9, 2009.

The wreckage of a helicopter is lifted by crane from the Hudson River and placed on a boat as seen from Hoboken, N.J., Sunday, Aug. 9, 2009.

Wreckage of a helicopter that collided with an airplane over the Hudson River Saturday sits under a blue tarp on the 12th Street Pier in Hoboken, N.J., Sunday, Aug. 9, 2009.

Debbie Hersman, chairman of the National Transportation and Safety Board, fields questions from reporters at the Stevens Institute of Technology's Babbio Center in Hoboken, N.J., on Sunday afternoon, Aug. 9, 2009.

Emergency personnel stand next to a tarp that covers some of the wreckage from a crash, involving a plane and a helicopter, that was pulled from the Hudson River in Hoboken, N.J., Sunday, Aug. 9, 2009.

Emergency personnel recover what appears to be a body from the Hudson River as seen from Hoboken, N.J., Sunday, Aug. 9, 2009. Police boats and divers on Sunday circled the wreckage of a submerged tourist helicopter as investigators resumed their search for debris and missing bodies from the helicopter and a small plane that collided in midair.

The wreckage of a helicopter that was hit by an airplane and crashed in the Hudson River is repositioned by a crane on a pier in Hoboken, N.J., Monday, Aug. 10, 2009. Divers hope to pull a plane out of the Hudson River on Monday, but their first priority is to recover the bodies of two remaining victims of the air collision that killed nine people, a chief investigator said.

Emergency personnel move pieces of a wrecked helicopter on a pier in Hoboken, NJ, Monday, Aug. 10, 2009.

A Piper PA-32 which took off from Teterboro Airport in New Jersey, and a Eurocopter AS 350 helicopter owned by Liberty Tours collided and crashed into the Hudson River.