How secure are cockpit doors?published at 21:03 BST
Wedaeli Chibelushi
Live page reporter
Earlier, Israel's prime minister said he spoke to a passenger who said he managed to break into the cockpit with a crew member.
In a similar testimony, another passenger told Israeli media that a group of men "burst" into the cockpit.
It is not yet clear how the cockpit door was opened, but aviation experts told the BBC cockpit doors are normally firmly locked and reinforced.
"My understanding has always been that it is a locked and bullet-proofed door, former airline captain Emma Henderson says.
Henderson says pilots in the cockpit can unlock the door from their seats.
Ex-pilot and aviation commentator Alastair Rosenschein expands on this, saying “there is a slightly different system in every aircraft” but most flight decks have an electronic switch that pilots can "simply flick”.


















