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I've been reading some of the e-mails that have come into the today, including this, courtesy of a British film maker currently in Cuba:

The first thing we are planning to film is Castro's birthday on 2nd December. It's going to be a tremendous spectacle: yesterday we saw jets practicing overhead, and the whole Revolution Square is full of grandstands etc. Whether the birthday boy appears or not is the big question...

And this from Miami:

I am not in Cuba but live in the middle of "Little Havana" - most of the Cubans living in exile here believe Castro is already gone and that the pictures we have seen in the last few weeks/months are a double. They are just waiting for confirmation but what then?

So, 50 years of Fidel Castro's Cuba. Wherever you are in the world, tell us what you think of the country and the man, as well as your thoughts on it's future. Given the recent developments in Washington and Cuba, will the relationship between the countries change?

Our guest in the studio on Friday is Dr Wayne S. Smith, he was Chief of Mission in the US Interests Section in Havana, and is now a Senior Fellow at the .

Dr Smith believes that Cuba poses no threat to US security – or to that of any other country, and that dialogue must be opened between Cuba and the United States. Do you agree with him? Or would you simply like to know more about the relationship between the United States and Cuba? Dr Smith is happy to take your questions, feel free to post them here...

Or are there any other issues or stories you think we should talk about on the programme? Let us know and we'll do our best to fit them in.