Eager to capitalize on the sensationalist appeal of a new anti-U.S. "axis," the international press often perpetuates a perception that Cuba and Venezuela are, in spirit and in deed, inseparable. Such depictions diminish the significant differences in the ways and the success with which each country promotes its image abroad. Although Cuba and Venezuela employ many of the same public diplomacy tactics to advance their related anti-U.S. worldviews, the Cuban regime has proven much more successful at playing the role of the victim and using this position as a way to increase its international legitimacy. Likewise, Cuba is far more sophisticated at employing cultural products to support diverse political, diplomatic, and economic ends-many of which arguably serve a market-oriented purpose rather than a strictly anti-imperialist or antiglobalization agenda.

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The success or failure of us-Colombian collaboration … will determine whether the heightened public security of the moment represents truly longterm progress or merely a hiatus from decades of civil conflict.

Burning on flat plates was studied at various orientations with respect to gravity. Flat wicks of ceramic (Kaowool PM) board (10 cm wide and 1-10 cm long) were saturated with methanol or ethanol. Steady flames were obtained that ranged from boundary layer flames to plume-type burning. The onset of unsteady flow and transition to turbulence commenced at Grashof numbers of 10 6-10 7 , increasing with decreasing angle (toward underside burning). The average burning rate per unit area was recorded along with the flame location. Experiments on polymethylmethacrylate were used for comparison with the liquid-wick results. The results roughly correlated with laminar pure convective theory, and improved results were indicated when the gravity term associated with the pressure gradient normal to the plate was included. Theoretical results by the integral method to reduce the partial differential equations to ordinary differential equations are presented.

The Mariel Boatlift of 1980 has not wanted for scholarly, journalistic, and artistic attention over the years. Yet, forty years later, there is much about this traumatic episode in Cuban, Cuban American, Caribbean, U.S. immigration, and South Florida history that remains underexplored or simply unsaid. In this introduction, issue co-editors Michael J. Bustamante and Lillian Manzor describe the aims and contents of this special issue, as well as its origins in the 2020 virtual program El Efecto Mariel: Before, During, and After, at the University of Miami's Cuban Heritage Collection. They also contextualize its contributions considering previous scholarship. For U.S. immigration policy, race/ethnic relations in South Florida, and Cuban American politics, the multiple, intersecting legacies of Mariel remain highly germane for understanding various aspects of the present. And in Cuba, too, the legacy of Mariel remains painfully alive, as practices of political exclusion associated with 1980-e.g. the "act of repudiation"-have been revived as a prominent feature of Cuban political conflict since 2020.