Sign 's deactivation comes as relations between U.S. , Cuba improve . Electronic sign was put on U.S. interests section building in Havana in 2006 . Comment: Cuba erected billboards to block the sign ; billboards were taken down this year .
Sign 's deactivation comes as relations between U.S. , Cuba improve . Electronic sign was put on U.S. interests section building in Havana in 2006 . Sign ran quotes from U.S. heroes , blasted Cuban government 's policies . Cuba erected billboards to block the sign ; billboards were taken down this year .