The U.S. Hosts 25 Percent Of The World’s Prison Population -- These Are The Consequences

This week, President Obama sat down with six inmates in Oklahoma, becoming the first sitting president to visit a federal prison. Coming just days after he announced that he would commute -- or end early -- the sentences of 46 non-violent drug offenders, it's clear that he has criminal justice reform on the mind.

So MTV News decided to reach out to experts in criminal justice -- Eric Sterling, President of the Criminal Justice Policy Foundation and Ann Jacobs, Director of the Prisoner Reentry Institute -- to help break down why we need prison reform and what it all means for the one in 99 adults living behind bars in the United States.