Few people associated the candidacy of Barack Obama with a “get tough” approach to illegal immigration. But the Immigrations and Customs Enforcement, better known as ICE, has stepped up deportations under President Obama and at the same time, a network of detention facilities has expanded to house illegal immigrants. Correspondent Maria Hinojosa from our partner program PBS-FRONTLINE, along with the Investigative Reporting Workshop spent the last year exploring the hidden world of immigration detention.