On this episode of 'American Conventions,' Taji Ameen meets the nearly 500 people—and puppets—who gather at the world's largest ventriloquist convention every year. From old hands who have been puppeteering since the 80s to newcomers in their teens, there's something for everyone at Vent Haven. Taji even swallows his pride and hits up the open mic with a routine of his own.

It may not surprise you to know that the popular entertainment has some very dark roots. By Andy Wright.