U.S. Navy LT JG Curtis Calabrese takes notes on board of a U.S. Navy Lockheed P-3C Orion patrol aircraft from Sigonella, Sicily, Sunday, May 22, 2016, searching the area in the Mediterranean Sea where the Egyptair flight 804 en route from Paris to Cairo went missing on May 19. Search crews found floating human remains, luggage and seats from the doomed EgyptAir jetliner Friday but face a potentially more complex task in locating bigger pieces of wreckage and the black boxes vital to determining why the plane plunged into the Mediterranean. (AP Photo/Salvatore Cavalli)
Possible underwater signal from EgyptAir 804 detected
A French naval vessel has detected an underwater signal that could have originated from the flight data recorder of crashed EgyptAir Flight 804. CNN's Ian Lee has more.
2:05 • Source: CNN
EgyptAir flight missing 19 videos
U.S. Navy LT JG Curtis Calabrese takes notes on board of a U.S. Navy Lockheed P-3C Orion patrol aircraft from Sigonella, Sicily, Sunday, May 22, 2016, searching the area in the Mediterranean Sea where the Egyptair flight 804 en route from Paris to Cairo went missing on May 19. Search crews found floating human remains, luggage and seats from the doomed EgyptAir jetliner Friday but face a potentially more complex task in locating bigger pieces of wreckage and the black boxes vital to determining why the plane plunged into the Mediterranean. (AP Photo/Salvatore Cavalli)
Possible underwater signal from EgyptAir 804 detected
02:05
Now playing
• Source: CNN
An aviation photographer took this photo of the missing EgyptAir A320 jet on June 11, 2015.
EgyptAir Flight 804's disappearance in 1 minute
01:09
Now playing
• Source: CNN
tsr todd dnt black box search_00003904.jpg
What is a black box anyway?
02:09
Now playing
• Source: CNN
A relative of a passenger who was flying aboard an EgyptAir plane that vanished from radar in route from Paris to Cairo overnight cries as family members are transported by bus to a gathering point at Cairo airport on May 19.
EgyptAir crash adds to Egypt's troubles
01:25
Now playing
• Source: CNN
Still pictures show parts and some of the passengers belongings of the missing Egyptair that have been recovered from the Mediterranean sea.
Officials: EgyptAir Flight 804 wreckage found
01:23
Now playing
• Source: CNN
Egyptair flight debris video images _00000000.jpg
First video of EgyptAir plane debris
01:19
Now playing
• Source: CNN
egyptair flight 804 investigation conflicting reports todd tsr_00000000.jpg
EgyptAir Flight 804: Conflicting reports over crash
02:10
Now playing
• Source: CNN
egyptair flight 804 crash investigation lee lklv _00005224.jpg
French, Egyptian subs join in flight 804 search
02:31
Now playing
• Source: CNN
Still pictures show parts and some of the passengers belongings of the missing Egyptair that have been recovered from the Mediterranean sea.
EgyptAir VP: 'Parts of the wreckage' spotted
04:30
Now playing
• Source: CNN
egyptair u.s. bomb lab lah dnt erin_00022022.jpg
First audio of EgyptAir pilot released
00:53
Now playing
• Source: CNN
Still pictures show parts and some of the passengers belongings of the missing Egyptair that have been recovered from the Mediterranean sea.
Submarine, acoustic detectors join EgyptAir 804 search
02:20
Now playing
• Source: CNN
egyptair u.s. bomb lab lah dnt erin_00015219.jpg
Inside a forensic bomb lab
02:50
Now playing
• Source: CNN
Sameh Shoukry Egypt's Foreign Minister Egyptair intv_00023426.jpg
Egypt foreign minister weighs in on EgyptAir crash
04:30
Now playing
• Source: CNN
Egyptian authorities: Debris is not EgyptAir wreckage
00:10
Now playing
• Source: CNN
This August 2015 photo shows EgyptAir Airbus A320 with the registration SU-GCC taking off from Vienna International Airport in Austria.
Security concerns at France's airport raise questions
02:42
Now playing
• Source: CNN
A relative of a passenger who was flying aboard an EgyptAir plane that vanished from radar in route from Paris to Cairo overnight cries as family members are transported by bus to a gathering point at Cairo airport on May 19.
U.S. officials believe EgyptAir brought down by bomb
01:46
Now playing
• Source: CNN
The EgyptAir Airbus A320 registered as SU-GCC is seen here on June 11, 2015.
Greek authorities: EgyptAir plane made 'sudden swerves'
01:50
Now playing
• Source: CNN
EgyptAir plane
EgyptAir official: distress signal in vicinity of plane
01:17
Now playing
• Source: CNN
past egyptian airline disasters vo nr_00003523.jpg
EgyptAir: Airline with history of hijackings
00:54
Now playing
• Source: CNN