NBC Sports produced a documentary "Karolyi" that I found myself watching at the barbershop and it is simply incredible.
Bela and his wife Martha are two longtime Olympic coaches who left communist Romania and defected to Houston, Texas, and brought their winning formula that earned gold medals for Americans Mary Lou Retton, Keri Strugg, Simone Biles and others.
Click here and watch one of the best sports docs on the sport ever produced.
