Slavery exists in the US as Chris Hedges shows here:
As Abby Martin shows here:
This video contains an extract from a film made for Channel 4 that can be seen in full here. The connection is made between the use of torture by American military personnel at Abu Ghraib and torture by guards in the American prison system.
An article on Dissident Voice also makes the connection between America’s prison system and slavery. It shows that slavery in the US did not end in 1865 but went underground.