The brain drain has always been harmful for any country, the nation invests in resource for its formation and after all it takes advantage of other nations, that is not fair, nothing ethical, said Michio Kaku, when he said that USA that has a secret weapon that is the H - 1B Visa, which facilitates the generators of knowledge to establish the US, that is not only in the US, without this the developed countries would collapse to the detriment in the countries where the flight occurs.