Puerto Rico- Capital Gain tax zero?

[Henry Clark]

Read a BP article on Puerto Rico.  Said there is a special investor program.  You don’t pay any capital gain taxes.  Since PR is a ???? protectorate of the U.S. you don’t have to pay reciprocating taxes back in the U.S.  

Clarify.   We invest in Belize which has no capital gains tax.   But we would still have to pay the capital gain taxes even if made overseas in Belize.  

Does anyone know if I sale an asset in the U.S., but have residency in PR do I still need to pay the taxes in the U.S.?  Thanks.