In the early days of communism in Cuba, Fidel Castro had pledged that every child under seven would have a liter of subsidised milk every day. For some time, they did -- but today, many go without. To circumvent the US embargo against Cuba and lagging domestic production, milk has to come from the other side of the world in an obstacle race that deprives many on the island of the staple. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES