In 2004, RHC and related mediumwave transmitters, such as Radio Rebelde, broadcast speeches by Venezuelan President Hugo Chávez as well as Castro. RHC was off the air temporarily in late August 2004 due to damage caused by Hurricane Charley. The English language service of the station broadcasts an hour long-broadcast which is rebroadcast throughout the day at different times and frequencies (AM international shortwave as well as FM in Havana). The program consists of a mix of news, commentary, history, music (both traditional and contemporary Cuban music) as well as a series of rotating special programs including the "Mailbag Show" (in which listener mail is read over the air), "Music with a Message" (normally featuring an internationally-known musician whose music touches on social justice themes), "World of Stamps", the sports program with Eduardo Gonzalez, and "DXers Unlimited", a program on the technical aspects of amateur radio and shortwave listening from announcer Arnie Coro (Ham radio call sign CO2KK). The current lead announcers are Ed Newman and Lena Valverde. Arts and Culture segments are normally by Gerwin Jones, a Canadian Journalist. Most of the commentary viewpoint segments are by Juan Jacomino. A past popular announcer from the early 1990s was Keith Perron, who later moved to China Radio International and is now host of the Taiwan-based "Happy Station Show". The shortwave numbers station nicknamed "Atencion", or HM01, by independent shortwave listeners has been linked to RHC radio transmissions equipment. In numbers station transmissions, a series of random numbers are read out over the air in multiple languages, or in digital modes or morse code. These audible transmission of numbers are believed to be one-time encrypted messages to espionage agents residing in the targeted country. Numbers station monitors have noted that on occasion RHC interval signals have been heard at the beginning or end of intelligence-related transmissions. The United States Government convicted the Cuban Five with evidence that was intercepted and decoded from HM01. The station's interval signal is "La Marcha del 26 de Julio" (The 26th of July March), written by Agustín Díaz Cartaya. Sometime during the interval, Thelma Rodriguez gives out the radio identifier details in the Spanish and English languages. "This is/You're listening to Radio Habana Cuba, broadcasting live from Havana, Cuba, free territory of the Americas" (Spanish: ""Este es/estás escuchando Radio Habana Cuba transmitiendo en vivo desde Habana, Cuba, territorio libre en America"").