BOSTON, June 22, 2023 (AFP) – A massive search and rescue effort for a missing submersible near the wreck of the Titanic was at a critical stage late Wednesday, with just hours left before the oxygen supply for the five people on board runs out. While coast guard officials insisted they remained “hopeful,” with a surge of assets and experts joining the operation and sonar picking up unidentified underwater noises, the challenge of locating and […]