Aboardi Ship News Today

The submersible they were is into the sea returned to port today. our ron allen was there. >> reporter: today the "polar prince" on a solemn journey, the support ship, flags at half mast, that launched the "titan" submersible on its fatal expedition, arriving back at home port. met by canadian investigators beginning to try to figure out what caused the disaster that killed the five men that left here aboard the ship. do you expect to be able to answer the question of what caused this implosion?...