Alva Review-Courier -

In a race against the clock on the high seas, an expanding international armada of ships and airplanes searched Tuesday for a submersible that vanished in the North Atlantic while taking five people down to the wreck of the Titanic.

U.S. Coast Guard officials said the search covered 10,000 square miles (26,000 square kilometers) but turned up no sign of the lost sub known as the Titan. Although they planned to continue looking, time was running out because the vessel had less than two days of oxygen left.

"This is a very complex search, and the unified team is working around the clock," Cpt...