chrissie hind, told about her visit to the island with a boyfriend four years ago. >> i was sitting with him having a coffee and said do you fancy going to cuba. he's like yeah, let's go. >> reporter: because of the half century old embargo on cuba and the castro brothers, americans are required by law to ask the u.s. government for permission first. democratic congresswoman kathy castor, who just returned from a trip to cuba, wants to change that. >> i think it's time to try something different and end the embargo and lift these travel restrictions. >> reporter: it's estimated that thousands of americans travel to cuba every year, but an exact number is hard to come by. the treasury department which grants the licenses for travel to cuba still won't reveal exactly how many americans are going to the island. jim acosta, cnn, washington. just ahead tonight, more threats, more bluster from north korea's jkim jong un. also, a rare and very disturbing