The deadly implosion of an experimental submersible en route to the deep-sea grave of the Titanic last June has not dulled the desire for ocean exploration. Tuesday marks one year since the Titan vanished on its way to the historic wreckage site. The U.S. Coast Guard quickly convened a high-level investigation into the disaster, but officials said no results will be released for at least another two months. The implosion killed the submersible's operator, Stockton Rush, and four others. Family, friends and fellow sea explorers plan to hold both public and private ceremonies this week to honor the victims.
