Although determined to carry forward Fidel Castro's policies, Raul Castro has opened up debate on the shortcomings of the communist system and has given some hope for change. Deborah Lutterbeck reports. SCRIPT: After almost half a century Cuba's Fidel Castro is stepping aside. Now Cubans face an uncertain new era. On the streets of Havana people hope this new era will bring a bit of modernization denied to the island since Castro's 1959 revolution. While tourists find the time warp antique cars and crumbling buildings picturesque, locals like this taxi driver named Micheal are tired of keeping old vehicles, and they want the government to do something about it. SOUNDBITE: Havana Taxi Driver, (Spanish) saying: "We know the government has possibilities to change these cars. We could give them some money and they could change these cars out. But they don't want to do it. We have to keep these cars that are fifty years old or more, that pollute the environment." Housing is...