Asiana Airlines crash in San Francisco

A photo provided by Antonette Edwards shows what an Asiana Airlines plane which crashed while landing at San Francisco airport on Saturday, July 6, 2013.

Asiana Airlines Flight 214 from Seoul crashed with 307 people on board while landing on Runway 28 Left, forcing passengers to jump down the emergency inflatable slides to safety. At least two people were killed and 49 seriously injured.

AP Photo/Bay Area News Group, John Green

Fire crews work the crash site of Asiana Flight 214 at San Francisco International Airport in San Francisco, Saturday, July 6, 2013.

Asiana Airlines Flight 214 crashed on Runway 28 Left at San Francisco International Airport Saturday, July 6, 2013.

This aerial photo shows the wreckage of Asiana Airlines Flight 214 after it crashed with 307 people on board, at San Francisco International Airport, Saturday, July 6, 2013.

This photo provided by Zach Custer shows smoke rising from what a federal aviation official said was Asiana Airlines Flight 214, after it crashed upon landing at San Francisco International Airport on Saturday, July 6, 2013.

A fire truck sprays water on Asiana Flight 214 after it crashed at San Francisco International Airport on Saturday, July 6, 2013, in San Francisco.

An Asiana Airlines Boeing 777 from Seoul crashed on the runway upon landing at San Francisco International Airport Saturday, July 6, 2013.

A Boeing 777 airplane lies burned on the runway after it crash landed at San Francisco International Airport July 6, 2013, in San Francisco. The Asiana Airlines passenger aircraft with 307 people on board was arriving from Seoul, South Korea.

Debris litters Runway 28 Left at San Francisco International Airport following the crash of an Asiana Airlines Boeing 777, Saturday, July 6, 2013.

The tail of Asiana Flight 214 is seen, right, after it crashed at San Francisco International Airport in San Francisco, Saturday, July 6, 2013.

An Asiana Airlines Boeing 777 is seen on the runway at San Francisco International Airport after crash landing on July 6, 2013.

This aerial photo shows the wreckage of the Asiana Airlines Flight 214, right, as another plane approaches at the San Francisco International Airport in San Francisco, Saturday, July 6, 2013.

An Asiana Airlines Boeing 777 from Seoul crashed on the runway upon landing at San Francisco International Airport Saturday, July 6, 2013.

Investigators pass the detached tail and landing gear of Asiana Flight 214 after it crashed at San Francisco International Airport on Saturday, July 6, 2013, in San Francisco.

Wreckage from a Boeing 777 airplane lies on the tarmac after it crashed while landing at San Francisco International Airport July 6, 2013, in San Francisco. An Asiana Airlines passenger aircraft coming from Seoul, South Korea crashed while landing.

People at Seoul Railway Station in Seoul, South Korea, watch a news program reporting about Asiana Airlines Flight 214, which took off from Seoul and crashed while landing at San Francisco International Airport, Sunday, July 7, 2013. The writing on the screen reads "Fire on the ceiling of the airplane."

From left, Alphonse Roig, his wife Christine Roig, and daughters Nanine Roig and Lana Roig wait at the British Airways counter for it to reopen at San Francisco International Airport July 6, 2013, in San Francisco, Calif. The family was trying to make it home to France after a Boeing 777 Asiana Airlines passenger aircraft coming from Seoul, South Korea crashed while landing.

Passengers wait as the international terminal at San Francisco International Airport remains closed July 6, 2013, in San Francisco, Calif. A Boeing 777 Asiana Airlines passenger aircraft coming from Seoul, South Korea crashed while landing.

The international terminal remains closed at San Francisco International Airport July 6, 2013, in San Francisco, Calif. A Boeing 777 Asiana Airlines passenger aircraft coming from Seoul, South Korea crashed while landing.

Investigators walk among wreckage from a Boeing 777 airplane that crashed while landing at San Francisco International Airport July 6, 2013, in San Francisco, Calif. An Asiana Airlines passenger aircraft coming from Seoul, South Korea crashed while landing. Two fatalities have so far been reported.

San Francisco Mayor Ed Lee, center, pauses as he speaks during a news conference at San Francisco International Airport on July 6, 2013, in San Francisco, Calif. A Boeing 777 passenger aircraft from Asiana Airlines coming from Seoul, South Korea crashed landed while on the runway at San Francisco International Airport.

The wreckage of Asiana Flight 214 sits where the plane crashed at San Francisco International Airport in San Francisco, Saturday, July 6, 2013. Asiana Airlines issued a statement that listed the number of passengers and their nationalities: 77 Korean citizens, 141 Chinese citizens, 61 U.S. citizens and 1 Japanese citizen. The passengers from China included a teacher and 34 high school students.

People are seen in The Reflection Room where friends and relatives of Asiana Flight 214 passengers await news following the crash of the passenger jet at the San Francisco International in San Francisco, Saturday, July 6, 2013.

People look at the wreckage of Asiana Flight 214 where it crashed at San Francisco International Airport on July 6, 2013. — AP Photo/Bay Area News Group, John Green

People look at the wreckage of Asiana Flight 214 where it crashed at San Francisco International Airport in San Francisco, Saturday, July 6, 2013.

Employees of Asiana Airlines talk on phones near a screen showing a news program reporting about Asiana Airlines flight 214 which took off from Seoul and crashed while landing at San Francisco International Airport at the Crisis Management Center of Asiana Airlines' head office in Seoul, South Korea, Sunday, July 7, 2013. The Asiana Airlines flight crashed while landing at San Francisco International Airport on Saturday, killing at least two people, injuring dozens of others and forcing passengers to jump down the emergency inflatable slides to safety as flames tore through the plane.

The detached tail and landing gear of Asiana Flight 214 rest on the tarmac after the plane crashed at San Francisco International Airport on Saturday, July 6, 2013, in San Francisco.

Investigators comb the end of a San Francisco International Airport runway following the crash of Asiana Flight 214 on Saturday, July 6, 2013, in San Francisco.

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.

NTSB Chairman Deborah Hersman and Investigator-in-Charge Bill English examine the interior of the crashed Asiana Airlines Boeing 777, at San Francisco International Airport, Saturday, July 6, 2013.

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.

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. — NTSB

This photo released by the National Transportation Safety Board on July 7, 2013 shows an NTSB officer at the scene where an Asiana Airlines flight crashed at San Francisco International Airport.

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

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

An NTSB officer examines a piece of Asiana Airlines Flight 214 after it crash landed on a runway at San Francisco International Airport in photos release July 7, 2013.

The wreckage of Asiana Airlines Flight 214, at San Francisco International Airport on Sunday, July 7, 2013 - one day after it crashed while landing.

Investigators form the National Transportation Safety Board at the scene of the Asiana Airlines crash at San Francisco International Airport, Sunday, July 7, 2013.

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

The wreckage of Asiana Flight 214 that crashed upon landing Saturday sits on the tarmac at San Francisco International Airport as a Scandinavian Airlines plane lands Monday, July 8, 2013 in San Francisco. Investigators said the Boeing 777 was traveling "significantly below" the target speed during its approach and that the crew tried to abort the landing just before it smashed onto the runway on Saturday. Two of the 307 passengers aboard were killed.