From Wikipidia: "In January 2006, USINT [it used to be the US Embassy] began displaying messages on a scrolling "electronic billboard" in the windows of their top floor. Messages include the George Burns quotation, "How sad that all the people who would know how to run this country are driving taxis or cutting hair." Following a protest march, the Cuban government erected a large number of poles, carrying black flags with single white stars, obscuring the messages.

"In June 2009, the electronic billboard was turned off and then removed, because, according to the United States Department of State, the billboard was not effective in delivering information to the Cuban people."