A recovery crew works among debris of Germanwings Flight 9525 at the crash site near Seyne-les-Alpes, France, on Friday, April 3. The crash killed all 150 people aboard and has raised questions about the co-pilot's mental state. Yves Malenfer/Ministere de l'Interier/AP
French Gen. David Galtier holds up a picture of the second black box from Germanwings 9525 during a news conference in Marseille, France, on Thursday, April 2. The flight data recorder shows that co-pilot Andreas Lubitz purposely used the controls to speed up the plane's descent, investigators said. BORIS HORVAT/AFP/Getty Images
Rescue workers recover debris from the crash site in the French Alps on Tuesday, March 31. Flight 9525 was traveling from Barcelona, Spain, to Dusseldorf, Germany, when it crashed. Yves Malenfer/Ministere de l'Interieur/AP
A helicopter drops rescue workers next to crash debris near Seyne-les-Alpes, France, on Sunday, March 29. GONZALO FUENTES/Reuters/LANDOV
Forensic experts work near the crash site on Thursday, March 26. Fabrice Balsamo/Gendarmerie Nationale/AP
Journalists stand in front of the Westerwald airfield in Montabaur, Germany, on March 27. Lubitz reportedly learned to fly here. Frank Augstein/AP
Investigators carry a computer from the home of Lubitz's parents in Montabaur, Germany, on Thursday, March 26. Thomas Lohnes/Getty Images
A police officer stands guard March 26 at an apartment building where Lubitz was thought to have lived in Dusseldorf. Martin Meissner/AP
A helicopter lifts a rescue worker from the crash site on March 26. ANNE-CHRISTINE POUJOULAT/AFP/Getty Images
Rescue workers continue to search the site of the crash on March 26. Francis Pellier MI DICOM/Ministere de l'Interieur/Getty Images
Search-and-rescue teams land near the crash site on Wednesday, March 25. F. Balsamo/Gendarmerie nationale/Ministere de l'Interieur via Getty Images
Debris from the plane is seen along a mountainside on March 25. F. Balsamo/Gendarmerie nationale/Ministere de l'Interieur via Getty Images
French military personnel move up a mountainside March 25 near Seyne-les-Alpes. Peter Macdiarmid/Getty Images
The cockpit voice recorder of the Germanwings jet appears in this photo provided by the French air accident investigation bureau on March 25. The device is designed to capture all sounds on a plane's flight deck. Bureau d'Enquetes et d'Analyses/AP
A helicopter comes in to land near Seyne-les-Alpes, the staging ground for search efforts, on March 25. Peter Macdiarmid/Getty Images
Rescue workers and members of the French Gendarmerie gather in Seyne-les-Alpes on Tuesday, March 24, as search-and-rescue teams struggle to reach the remote crash. Claude Paris/AP
Wreckage is seen at the crash site on March 24. THOMAS KOEHLER/PHOTOTHEK HANDOUT/EPA/LANDOV
Response teams gather in Seyne-les-Alpes on March 24. BORIS HORVAT/AFP/Getty Images
Relatives of the flight's passengers arrive at the airport in Barcelona on March 24. David Ramos/Getty Images
People hold hands walking through the Dusseldorf Airport on March 24. Frank Augstein/AP
The arrivals board at the Dusseldorf Airport shows Germanwings Flight 9525 without a status on March 24. Sascha Steinbach/Getty Images
People arrive at the Dusseldorf Airport on March 24. Frank Augstein/AP
An employee of Swissport, the handling agent of Germanwings flights from Barcelona, speaks by phone at the Barcelona-El Prat Airport on March 24. David Ramos/Getty Images
Relatives of people involved in the crash arrive at the Barcelona airport on March 24. Emilio Morenatti/AP
A man in Madrid looks at a monitor with a map, released from the Flightradar24 website, showing the point where the plane's radar signal went missing. ZIPI/EPA/Landov
This undated file photo shows the Germanwings Airbus A320 that crashed. Germanwings is a low-cost airline owned by the Lufthansa Group. XINHUA/LANDOV