A search and rescue mission is underway for a private submarine carrying five passengers, including British businessman Hamish Harding and Pakistani businessman Shahzada Dawood and his teenage son, Suleman. The families of the passengers have expressed their hope that the submarine is located as quickly as possible and the crew is safe, and the search and rescue mission is being conducted by the U.S. Coast Guard and the U.K. Maritime and Coastguard Agency. The families of the passengers have asked for privacy during this difficult time and are grateful for the concern being shown by their colleagues and friends.