Presumed human remains and debris from the tourist submersible crushed to pieces in an undersea implosion that killed all five people aboard were recovered from the ocean bottom and brought ashore to Canada on Wednesday, the US Coast Guard said. The possible remains and shattered bits of the submersible Titan, destroyed while diving to the century-old wreck of the Titanic, were carried to St. John's, Newfoundland, about 400 miles (650km) north of the accident site.