Music Scholar & College Prof Barred From U.S., but No One Will Tell Her Why

Violinist and scholar Naini Ghuman was graduated from Oxford and the University of California at Berkeley. She's a violinist, scholar, author, and her passion is Edward Elgar and musical traditions in India.

When she returned to the U.S. from a research trip to England, she found that she was barred from re-entering the country.  So far, she still doesn't know why.

I'm not quite sure why a musicologist focusing on Edward Elgar would seem to be a terrorist threat.