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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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    Pres. Obama meets with Castro in historic trip to Cuba

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Pres. Obama meets with Castro in historic trip to Cuba

Pres. Obama calls for progress on human rights and democracy in Cuba. CNN's Jim Acosta is traveling with the president in Havana.

Pres. Obama meets with Castro in historic trip to Cuba

Pres. Obama calls for progress on human rights and democracy in Cuba. CNN's Jim Acosta is traveling with the president in Havana.