A picture of U.S. President Barack Obama (R) and Cuban President Raul Castro shaking hands is seen at the Corona Tobacco factory in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





Tourists chat at the Cohiba Tobacco factory during a visit in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





Mario Perez, 54, works in the moistening chamber at the Cohiba Tobacco factory in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





A worker wearing a cap with the colours of the U.S. flag rolls tobacco at the Corona Tobacco factory in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





A worker smokes a cigarette at the Corona Tobacco factory in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





Women work at the quality control room at the Corona Tobacco factory in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





Milagros Suarez, 41, works at the quality control room at the Corona Tobacco factory in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





Jordanka Mendez, 37, works at the quality control room at the Corona Tobacco factory in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





A picture of U.S. President Barack Obama (R) and Cuban President Raul Castro shaking hands is seen at the Corona Tobacco factory in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





Yoanks Mayas, 45, rolls tobacco at the Cohiba Tobacco factory in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





A woman fixes a band on a cigar at the Corona Tobacco factory in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





Francis Sierra, 23, smokes as she competes for the longest ash during the XVIII Habanos Festival in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





Tobacco roller Niovis Orama (C), 43, smokes as she competes for the longest ash during the XVIII Habanos Festival in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





Competitors from China smoke as they compete for the longest ash during the XVIII Habanos Festival in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





Competitors from China smoke as they compete for the longest ash during the XVIII Habanos Festival in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





A competitor takes a selfie as he competes for the longest ash during the XVIII Habanos Festival in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)





Actor Max Uralsky, from Russia, smokes as he competes for the longest ash during the XVIII Habanos Festival in Havana, March 3, 2016. (Photo by Alexandre Meneghini/Reuters)