Five crew members on board missing Titanic sub believed to be dead
More ships were scrambled to help find the missing deep-sea vessel as oxygen levels dwindled
The Titan submersible has five people on board: (from left) OceanGate founder Stockton Rush, Hamish Harding, Paul-Henry Nargeolet, Suleman Dawood and his father Shahzada
The pilot and four passengers of a missing submersible that disappeared en route to the wreckage of the Titanic are believed to be dead, the expedition company said Thursday.
