The search for the submersible that disappeared en route to the Titanic wreckage site appeared more dire by the minute on Tuesday, with the U.S.
World 
OceanGate/YouTube 
Cavalry Beefed Up at Titanic Search Site—but Key Equipment Still Missing
RACE AGAINST TIME
Private companies and foreign governments joined the search on Tuesday but officials gave a grim update at an afternoon press briefing.
