This aerial photo shows the wreckage of the Asiana Flight 214 airplane after it crashed at the San Francisco International Airport in San Francisco, Saturday, July 6, 2013. (AP Photo/Marcio Jose Sanchez, File)
Two men take photographs of the rear of Asiana Flight 214, which crashed on July 6, 2013, at San Francisco International Airport, in San Francisco, Friday, July 12, 2013. (AP Photo/Jeff Chiu)
The wreckage of Asiana Flight 214, which crashed on Saturday, July 6, 2013, seen at San Francisco International Airport, in San Francisco, Friday, July 12, 2013. (AP Photo/Jeff Chiu)
A man walks near an engine of Asiana Flight 214, which crashed on Saturday, July 6, 2013, at San Francisco International Airport, in San Francisco, Friday, July 12, 2013. (AP Photo/Jeff Chiu)
A man looks at the wreckage of Asiana Flight 214, which crashed on Saturday, July 6, 2013, at San Francisco International Airport in San Francisco, Friday, July 12, 2013. (AP Photo/Jeff Chiu)
Photo of charred cabin interior of Asiana flight 214. (NTSB/Twitter)
Photo of Asiana 214 debris field. All debris has been removed from runway and runway released to airport. (NTSB/Twitter)
NTSB Chairman Hersman & IIC Bill English survey accident scene. (@NTSB)
NTSB investigator Brian Murphy shows the depth of the debris field to NTSB team. (@NTSB)
Nose section of Asiana Airline Flight 214 cockpit. (@NTSB)
Investigator in Charge Bill English & Chairman Hersman discuss progress of Asiana 214 investigation. (@NTSB)
NTSB Chairman Hersman receives overview of accident site by NTSB engineer Erin Gormley. (@NTSB)
Students who survived the Asiana Airlines Flight 214 crash met with the Chinese Consul General in San Jose on Monday. (KGO)
Students who were on the Asiana Airlines Flight 214 that crashed at San Francisco International Airport on Saturday. (KGO)
The NTSB released photos from their investigation of Asiana Airlines Flight 214, which crashed at SFO on Saturday. (Twitter)
The NTSB released photos from their investigation of Asiana Airlines Flight 214, which crashed at SFO on Saturday. (Twitter)
The NTSB released photos from their investigation of Asiana Airlines Flight 214, which crashed at SFO on Saturday. (Twitter)
The NTSB released photos from their investigation of Asiana Airlines Flight 214, which crashed at SFO on Saturday. (Twitter)
The NTSB released photos from their investigation of Asiana Airlines Flight 214, which crashed at SFO on Saturday. (Twitter)
The NTSB released photos from their investigation of Asiana Airlines Flight 214, which crashed at SFO on Saturday. (Twitter)
Heavy smoke coming from the Boeing 777 that crash landed at the San Francisco International Airport on Saturday. (Photo submitted via uReport)
Asiana Flight 214 airplane passenger (KGO)
People waiting in long lines at San Francisco International Airport after a plane crash landed on the runway on Saturday. (KGO)
Asiana Airlines flight from Seoul, South Korea, crashed while landing at San Francisco International Airport on Saturday. (Photo submitted via uReport by Hasani Sinclair)
Survivors in the immediate aftermath of Asiana Flight 214 crash. (Courtesy Ben Levy @BenLevy74)
Asiana Airlines Flight 214 engulfed in flames after crashing on the runway at San Francisco International Airport. (Courtesy Rebecca J. Richardson)
Asiana Airlines Flight 214 engulfed in flames after crashing on the runway at San Francisco International Airport. (Courtesy Rebecca J. Richardson)