Search for Titanic submersible surpasses crucial 96-hour mark: Here's what we know

The search for the missing submersible on an expedition to view the wreckage of the Titanic passed the critical 96-hour mark Thursday when breathable air could have run out, a grim moment in the intense effort to save the five people aboard. STORY: https://www.fox32chicago.com/news/missing-titanic-submersible-search-thursday-96-hour-mark-oxygen