Photos of Asiana crash wreckage

This photo released the National Transportation Safety Boards shows an NTSB officer at the scene where an Asiana Airlines flight crashed at San Francisco International Airport. — National Transportation Safety Board

A officer from the National Transportation Safety Board is pictured at the scene where Asiana Airlines Flight 214 crashed at San Francisco International Airport.

On July 6, 2013, the Asiana Boeing 777 crash-landed. Two passengers were killed; a third later died of her injuries. Scores more were injured, some critically.

The crash-landing occurred after the airliner collided with a rocky seawall just short of the runway.

"It was a horrible thud," said Kelly Thompson, who observed the crash from a hotel parking lot at the airport. She said the plane bounced, then slid on the runway.

Left: A schematic of the crashed plane with its exits marked.

Investigators from the National Transportation Safety Board conduct their first site assessment of the crash of Asiana Airlines Flight 214 at San Francisco International Airport, Saturday, July 6, 2013.

The interior of the Asiana Boeing 777 that crashed upon landing at San Francisco International Airport, Sunday, July 7, 2013.

NTSB officers examine the scene of an Asiana Airlines crash at San Francisco International Airport in photos released Sunday, July 7, 2013. — National Transportation Safety Board

NTSB officers examine the scene of an Asiana Airlines crash at San Francisco International Airport in a photo released Sunday, July 7, 2013.

According to the NTSB, the early investigation indicates that the pilots - a trainee and his instructor - had failed to realize until too late that the aircraft was dangerously low and flying too slow on its approach.

NTSB Investigator in Charge Bill English and Chairman Deborah Hersman discuss progress on the investigation into the crash of Asiana flight 214 as they survey the damaged Boeing 777's fuselage, July 9, 2013, at San Francisco International airport.

The interior of of Asiana Airlines Flight 214 is seen at at San Francisco International Airport. The NTSB has said that the automated controls were working properly at the time of the crash.

A view of debris from Asiana Airlines Flight 214, at San Francisco International Airport.

An NTSB officer examines a piece of Asian Airlines Flight 214 after it crash landed on a runway at San Francisco International Airport. — National Transportation Safety Board

An NTSB officer examines a piece of Asiana Airlines Flight 214 after it crash-landed on a runway at San Francisco International Airport.

NTSB investigators are visible through the windows of the fire-scorched remains of Asiana Airlines Flight 214.

A landing gear is seen amid the wreckage of Asiana Airlines Flight 214.

The wreckage of Asiana Airlines Flight 214.

Greg Smith of the National Transportation Safety Board, with the flight data recorder and cockpit voice recorder from Asiana Flight 214, at the NTSB's lab in Washington, D.C., Sunday, July 7, 2013.

Among the data parameters documented by flight recorders in Boeing 777s are time, altitude, airspeed, vertical acceleration, heading, time of each radio transmission to or from air traffic control, pitch and roll, longitudinal acceleration, control column or pitch control surface position, and engine thrust.

Burned seats are visible in the wrecked fuselage of Asiana Airlines Flight 214. After the NTSB released the crashed site from its investigation, and the FAA conducted an inspection of the runway, the plane's fuselage was moved on Friday, July 12, 2013 to another area of the airport for temporary storage. It will be moved to a permanent location away from the airport within the next two weeks, officials told CBS Station KPIX.

The wrecked fuselage of Asiana Airlines Flight 214 sits in a storage area at San Francisco International Airport on July 12, 2013 in San Francisco, California.

The wrecked fuselage of Asiana Airlines Flight 214 sits in a storage area at San Francisco International Airport on July 12, 2013, after being moved from the runway.

The wrecked engines of Asiana Airlines Flight 214 sit in a storage area at San Francisco International Airport on July 12, 2013 in San Francisco, California. Nearly one week after the Boeing 777 crash landed at San Francisco International Airport, the wrecked fuselage was moved from the runway.

A charred emergency exit door is seen on the wrecked fuselage of Asiana Airlines Flight 214 as it sits in a storage area at San Francisco International Airport on July 12, 2013 in San Francisco, California. Nearly one week after the Boeing 777 crash landed, the wrecked fuselage was moved from the runway.