http://en.wikipedia.org/wiki/Radio_Habana_CubaRadio Habana Cuba (RHC) is the official international broadcasting station of Cuba. It began broadcasting in 1961, two years after the Cuban Revolution. During the Cold War, RHC relayed propaganda broadcasts from North Vietnam and North Korea, and the USSR, as well as its orginal programming. In the 1960s, Radio Habana Cuba broadcast "Radio Free Dixie" aimed at African-Americans struggling against segregation and Jim Crow in the southern United States.
At times in the 1980s, in order to protest the Reagan administration's Cuba policy and its instigation of the anti-Castro Radio Martí program from the Voice of America, Radio Habana Cuba broadcast briefly on mediumwave frequencies at a greatly boosted power allowing the station to be heard on American AM radios and overwhelming local American AM stations broadcasting on that frequency, including clear channel station WHO in Des Moines, Iowa. This practice has not been repeated frequently, and Radio Martí is still audible in Cuba on 1180kHz.
In 2004, RHC and related mediumwave transmitters, such as Radio Rebelde, broadcast speeches by Venezuelan President Hugo Chavez as well as Castro.