The Confederate Submarine H.L. Hunley, which was the first submarine in history to sink an enemy warship, has been put upright for the first time since it sank off the South Carolina coast in 1864.When the Hunley was raised in 2000, it was raised the same way it was found lying on the bottom of the ocean floor at a 45 degree angle.  It has been kept in slings at the same angle ever since. In order to continue the conservation process, scientists needed to set the vessel upright. The process took a team of workers two days to complete. The following is a time lapse video of the process.