Inside the Costa Concordia wreck

Italian Coast Guard diver searches Costa Concordia for survivors — AP Photo/Italian Coast Guard

In this photo released by the Italian Coast Guard, a coast guard scuba diver makes his way through floating pieces of furniture inside the cruise ship Costa Concordia on Jan. 15, 2012, after it ran aground off the tiny Tuscan island of Giglio, Italy.

Italian firefighters scuba divers approach the cruise ship Costa Concordia two days after it ran aground off the tiny Tuscan island of Giglio, Italy, Jan. 16, 2012.

In this underwater photo taken on Jan. 13, a scuba diver swims next to the hull of the cruise ship Costa Concordia, after it ran aground off the tiny Tuscan island of Giglio, Italy.

Diver working inside wrecked Costa Concordia — AP Photo/Italian Coast Guard

In this underwater photo released by the Italian Coast Guard a scuba diver swims inside the cruise ship Costa Concordia, Jan. 16, 2012 after it ran aground off the tiny Tuscan island of Giglio, Italy.

In this underwater photo taken on Jan. 13, a scuba diver swims next to the cruise ship Costa Concordia, after it ran aground off the tiny Tuscan island of Giglio, Italy.

In this photo released by the Italian Coast Guard, a coast guard scuba diver makes his way through floating pieces of furniture inside the cruise ship Costa Concordia, Jan. 15. 2012, after it ran aground off off the tiny Tuscan island of Giglio, Italy.

A Coast Guard scuba diver makes his way through floating pieces of furniture inside the cruise ship Costa Concordia Sunday, Jan. 15, 2012.

In this photo released by the Italian Coast Guard Monday, Jan. 16, 2012 chairs and tables are seen inside the cruise ship Costa Concordia, Jan. 15, 2012 after it ran aground near the tiny Tuscan island of Giglio, Italy.

In this photo released by the Italian Coast Guard, chairs and tables are seen inside the cruise ship Costa Concordia on Jan. 15, 2012 after it ran aground off the tiny Tuscan island of Giglio, Italy.

In this underwater photo released by the Italian Coast Guard, Jan. 16, 2012 the cruise ship Costa Concordia leans on its side, after it ran aground off the tiny Tuscan island of Isola del Giglio, Italy. The Costa Concordia ran aground after colliding with a rock.

In this underwater photo released by the Italian Coast Guard, Jan. 16, 2012 the cruise ship Costa Concordia leans on its side, after it ran aground off the tiny Tuscan island of Isola del Giglio, Italy.

In this underwater photo released by the Italian Coast Guard, Jan. 16, 2012 the cruise ship Costa Concordia leans on its side, after it ran aground off the tiny Tuscan island of Isola del Giglio, Italy. The Costa Concordia ran aground after colliding with a rock.

In this underwater photo released by the Italian Coast Guard, Jan. 16, 2012 the cruise ship Costa Concordia leans on its side, after it ran aground off the tiny Tuscan island of Isola del Giglio, Italy.

In this underwater photo released by the Italian Coast Guard Monday, the cruise ship Costa Concordia leans on its side, after it ran aground near the tiny Tuscan island of Isola del Giglio, Italy. (AP Photo/Italian Coast Guard, ho)

In this underwater photo released by the Italian Coast Guard Monday, the cruise ship Costa Concordia leans on its side, after it ran aground near the tiny Tuscan island of Isola del Giglio, Italy.

In this underwater photo taken on Jan. 13, a view of the cruise ship Costa Concordia, after it ran aground near the tiny Tuscan island of Giglio, Italy. Italian rescue officials say a passenger's body has been found in the wreckage of the Costa Concordia cruise ship, raising to 11 the number of confirmed dead in the disaster. Twenty-nine people remain unaccounted for.

Italian firefighters climb aboard the cruise ship Costa Concordia as it leans on its side after running aground off the tiny Tuscan island of Giglio, Italy, Thursday, Jan. 19, 2012.

Italian firefighters work on the Costa Concordia cruise ship off the island of Giglio, Italy. The cruise ship grounded off Tuscany shifted again on its rocky perch, forcing the suspension of search and rescue operations for the 21 people still missing. It was not clear if the movements registered overnight by on-board sensors were just vibrations as the Costa Concordia settles on the rocks off the Tuscan island of Giglio or if the massive ocean liner is slipping off the reef.

In this photo taken on Thursday, Jan. 19, 2012 and released by Italy's Vigili del Fuoco, firefighters work on the Costa Concordia cruise ship off the tiny island of Giglio, Italy.

In this photo taken on Thursday, Jan. 19, 2012 released by Italy's Vigili del Fuoco, firefighters work on the Costa Concordia cruise ship off the island of Giglio, Italy.

A view of the upper deck of the cruise ship Costa Concordia, off the tiny Tuscan island of Giglio, Italy, Friday, Jan. 20, 2012.

In this undated photo released Friday, Jan. 20, 2012, Italian Carabinieri scuba divers swim close to the Costa Concordia cruise ship off the island of Giglio, Italy.

In this undated photo released by the Italian Carabinieri Friday, Jan. 20, 2012, police scuba divers swim close to the Costa Concordia cruise ship off Giglio.

In this undated underwater photo released by the Italian Carabinieri on Friday, Jan. 20, 2012, a police scuba diver swims next to the Costa Concordia cruise ship off the island of Giglio, Italy.

An Italian Carabinieri scuba diver swims next to the Costa Concordia cruise ship's bell off Giglio.

In this undated underwater photo released by the Italian Carabinieri Friday, Jan. 20, 2012, two police scuba divers swim next to the Costa Concordia cruise ship's bell, off the tiny island of Giglio, Italy.

An Italian Carabinieri scuba diver swims next to the Costa Concordia cruise ship off Giglio, Italy.

A Carabinieri scuba diver swims next to the Costa Concordia cruise ship's anchor, off the island of Giglio, Italy.

An Italian police scuba diver swims next to the Costa Concordia cruise ship off the island of Giglio, Italy.

In this undated underwater photo released by Italy's Carabinieri on Friday, Jan. 20, 2012, a police scuba diver swims next to the Costa Concordia cruise ship off Giglio, Italy.

Divers of the Nucleo Operatori Subacquei Guardia Costiera (Coast Guard) conduct a Search and Rescue operation that led to the discovery of the body of a woman inside of the ship Costa Concordia on January 21, 2012 in Giglio Porto, Italy.

A diver of the Nucleo Operatori Subacquei Guardia Costiera (Coast Guard) conducts a Search and Rescue operation that led to the discovery of the body of a woman inside of the ship Costa Concordia on January 21, 2012 in Giglio Porto, Italy.

Divers of the Nucleo Operatori Subacquei Guardia Costiera (Coast Guard) conduct a Search and Rescue operation that led to the discovery of the body of a woman inside of the ship Costa Concordia on January 21, 2012 in Giglio Porto, Italy.