Fidel Castro's estranged sister has hit out at the celebrations that have been taking place in Miami following news of the Cuban leader's poor health. Members of the exile community have taken to the streets since Monday's news that power was being temporarily handed to Mr Castro's brother, Raul. Echoing officials, Juanita Castro said she had heard her brother was stable. Neither Mr Castro nor his brother have appeared in public this week, fuelling speculation about the island's future. The BBC's Stephen Gibbs in Havana says the situation in Cuba is calm, but security has increased. 'Very alive' Ms Castro,...