Colombian pop star and other Latin American artists called for a free Cuba. By Gil Kaufman Juanes performs in Havana, Cuba on Sunday Photo: Sven Creutzmann/ Getty Images The Obama administration has been hinting at a possible thaw in the half-century stand-off with Cuba, and on Sunday Colombian pop star Juanes did his best to further the cause by headlining a massive concert for peace in Havana’s famed Plaza de la Revoluci
