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US President Barack Obama (L) and Cuban President Raul Castro give a joint press conference at the Revolution Palace in Havana on March 21, 2016. Cuba's Communist President Raul Castro on Monday stood next to Barack Obama and hailed his opposition to a long-standing economic "blockade," but said it would need to end before ties are fully normalized.   AFP PHOTO/Nicholas KAMM / AFP / NICHOLAS KAMM        (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)
US President Barack Obama (L) and Cuban President Raul Castro give a joint press conference at the Revolution Palace in Havana on March 21, 2016. Cuba's Communist President Raul Castro on Monday stood next to Barack Obama and hailed his opposition to a long-standing economic "blockade," but said it would need to end before ties are fully normalized.   AFP PHOTO/Nicholas KAMM / AFP / NICHOLAS KAMM        (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)

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Castro to CNN's Acosta: 'What political prisoners?'

President Barack Obama may be the first sitting U.S. President to visit Cuba in nearly 90 years, but not everyone is celebrating. CNN's Jim Acosta reports on the historic visit.

Castro to CNN's Acosta: 'What political prisoners?'

President Barack Obama may be the first sitting U.S. President to visit Cuba in nearly 90 years, but not everyone is celebrating. CNN's Jim Acosta reports on the historic visit.