Special: The Costa Concordia Disaster, 1 Year Later

(5:45 p.m. EST) -- With the rusted wreck of the Costa Concordia cruise ship as backdrop, a day of mourning and memorials took place on the Italian island of Giglio today, one year after the ship ran aground, claiming 32 lives.

Memorials began at daybreak as a British boat involved in the effort to re-float the ship used its crane to return part of the rock that ripped a 230-foot gash in the side of Concordia back to the sea. Relatives of those who died threw flowers into the sea and watched from a ferry whose foghorn commemorated the dead with 32 blasts.

A memorial plaque was affixed to the boulder, and a plaque with the names of the 32 victims was unveiled at the end of a jetty near the shipwreck following a memorial mass.

Those present closed the day's ceremonies with a minute of silence, held at 9:45 p.m. local time, to remember the exact moment that Concordia ran aground.

--by Jamey Bergman, U.K. Production Editor