CANON CITY, CO-- From left to right, Fremont Correctional Facility inmates, Michael East, Tommy Shanteler, Ricardo Moreno and Mario Galindo, work on a solar power related problem during a Renewable Energy class at the prison in Canon City Friday afternoon [Getty Images]

CANON CITY, CO-- From left to right, Fremont Correctional Facility inmates, Michael East, Tommy Shanteler, Ricardo Moreno and Mario Galindo, work on a solar power related problem during a Renewable Energy class at the prison in Canon City Friday afternoon. Andy Cross, The Denver Post (Photo By Andy Cross/The Denver Post via Getty Images) — see more

CANON CITY, CO-- From left to right, Fremont Correctional Facility inmates, Michael East, Tommy Shanteler, Ricardo Moreno and Mario Galindo, work on a solar power related problem during a Renewable Energy class at the prison in Canon City Friday afternoon. Andy Cross, The Denver Post (Photo By Andy Cross/The Denver Post via Getty Images)