1 of 8
Workers from the U.S. firm Titan Salvage and Italian firm Micoperi work on salvaging the the Costa Concordia near the harbor of Giglio Porto, Italy. Salvage crews began work to re-float the half-submerged Costa Concordia cruise liner in what is set to be the biggest ever operation of its kind. The cruise liner, operated by Carnival Corp's Costa Cruises unit, capsized off the Tuscan island of Giglio after hitting rocks on January 13. At least 30 people died and two are still unaccounted for.