thank you so much for joining us. the news continues. cnn tonight with abby phillips starts right now. thanks, caitlin. good evening, everyone. this is a critical night in the search for the titanic sub. there are only 7-8 hours left of breathable air for the five on board. the u.s. coast guard making it clear earlier today, this is 100% still a search and rescue mission. every available asset is being put to work finding the vessel. there is still hope. more noises have been picked up. they were similar to the sounds that were picked up in the search efforts yesterday. the coast guard still can t determine exactly what the source is. i can t tell you what the noises are. i think the most important point, we are searching where the noises are. that is all we can do at this point. that search has grown in the number of vessels, aircraft on the mission, and in the size of the search area. two times the size of connecticut. the focus is on an area 900 miles off the coast o
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