Yes, The Florida Keys are in the Caribbean Sea.
Its not a state at all its an island in the southeastern Caribbean.
They are located in the Caribbean Sea, so yes, they are a part of the Caribbean.
The US state that does not have a straight line in any part of its border is Hawaii.
All of them Not a part of any US state-Wash, DC
Yes, it is. However, Caribbean citizens do not consider us real Caribbeans.
No. But the US has territorial control over Guantanamo base in Cuba.
The Caribbean is a region with many different countries. The Unites States has two Caribbean territories: Puerto Rico and the US Virgin Islands.
No foreign country owns any part of a US state.
Puerto Rico is an autonomous region with US privileges. US Virgin Islands are part of the US.
Peru
No, Puerto Rico is in the Caribbean. Puerto Rico is both physically and politically a part of North America. It is a Caribbean Island, however, these islands are grouped with North America. It is also a part of the US, so it is politically a part of North America.
To my knowledge, there are no Caribbean medical schools in the US. However, there are American medical schools in the Caribbean. Perhaps this might be an acceptable option for you.