The Costa Concordia has been grounded for 20 months. The 100,000 ton cruise ship slammed into rocks off the Tuscan island of Giglio in January 2012, killing 32 people and forcing the evacuation of 4,000 passengers. Now the liner’s finally set to be lifted upright in an unprecedented operation led by US firm Titan Salvage and Italy’s Micoperi. Titan’s senior salvage master Nicholas Sloane says they’re using a technique called ‘parbuckling’.