Canadian and European business executives. and their governments. are understandably upset at the prospect of their citizens being kept out of the United States because they do business with Cuba. There is an international consensus that countries such as Iran pose a threat to global stability. and therefore travel by its officials should be limited. But people doing business In Cuba are not threats to our security. and accordingly should not categorically be denied access to the United States. Of course. most of our allies dont need visas and will enter anyway. undermining the force of the statute. But it looks tough -and is more or less pointless. Mr.