Mike Reiss, former Titanic submersible passenger, says his sub lost contact with host ship

Titanic submersible: US Coast Guard briefs on missing sub with five believed to be aboard | ABCNL
Titanic submersible: additional deepwater equipment being sent for missing sub search | ABCNL
'Debris field' discovered within search area of missing submersible near Titanic wreck
Cruise passenger disappears aboard Carnival ship l GMA
Search for Titanic sub intensifies after banging noises heard underwater l WNT
Titanic submersible victim’s deaths ‘brought the world together,’ Dawood family member says
Titanic submersible: 'This is still a rescue mission,' Coast Guard insists
Missing Titanic tourism sub has run out of oxygen, estimations suggest
'Titanic' filmmaker James Cameron calls out 'three potential failure points' on Titan submersible
Titanic expert Bob Ballard reacts to 'catastrophic implosion' of missing submersible