Live updates: Missing Titanic sub search continues as banging sounds heard - CNN

Live updates: Missing Titanic sub search continues as banging sounds heard  CNNMissing Titanic submersible live updates: Search expands 'exponentially'; more sounds heard  USA TODAYOceanGate Was Warned of Potential for ‘Catastrophic’ Problems With Titanic Mission  Yahoo News5 things to know today: Sounds detected in search for Titanic sub  CTV NewsOfficials: Submersible now has only about 12 hours of oxygen left  CBS New YorkView Full