Cuban dissidents hold posters with images of the victims of a sunken tugboat in 1994 during a march in Havana July 13, 2005. Cuban dissidents marched to Havana's Malecon sea wall to mark the sinking of a tugboat packed with Cubans seeking to leave the country in 1994. The demonstrators were quickly surrounded and outnumbered by angry government supporters, forcing the dissidents to disperse. REUTERS/Claudia Daut CD/SA