We don't need professional cooperation in the sciences or medicine or anything else, because nothing good ever came out of a foreign country. Foreign Service officers shouldn't even be required to know a foreign language, let alone a foreign culture, because all they've got to do is telephone from their desks to all those foreign countries and tell those other countries what's what.
Why stop there? No more allowing foreign companies to invest in the United States, because that means we have to let in foreigners--especially engineers and chemists and doctors, because they could learn something that could harm U.S. security. Marriages between U.S. citizens and foreigners should also be null and void--they could just be marrying U.S. citizens to get green cards and learn important state secrets. Time to put up a wall and not let anybody in or out.
Granted, the Soviet sphere tried all this before. But it's different when it's us.