Powerful Gustav heads to Caymans :

Hurricane Gustav is moving towards the Cayman Islands as it continues to threaten Cuba and the US Gulf Coast.
The storm has already killed at least 71 people as it passed through the Dominican Republic, Haiti and Jamaica.
Gustav could develop into a category three storm over the weekend as it passes over warm waters.
The warnings came as New Orleans buried some of the last unidentified victims of Hurricane Katrina, which devastated the city three years ago.
Both New Orleans and coastal Mississippi have been holding commemorations for the victims of Hurricane Katrina on the anniversary of the storm sweeping ashore.