Quote:
appropriated yet another violin in order to finish.
[...]
it was her American debut (New York Philharmonic if memory serves)

Thanks for the clarification. From the source I read, I couldn't tell if it was one string twice, or two strings on one violin. So I just naturally assumed the most impressive case. Not that it wasn't extremely impressive in any case.
Especially at only 14 years old!

Also, according to that source (Snopes) it happened at Massachusetts' Tanglewood Festival.