On the History Channel, they have started a new season of "The Food That Built America."
The show covers the history of different food products and restaurant franchises.
Sunday's episode looked at the rise of Sub sandwiches in the fast-food market, profiling the people behind Subway and the Blimpie Sub franchise.
Blimpie was actually the first sub sandwich franchise to break out on a regional level, but Subway surpassed them to become the biggest on a national level.
One of the co-founders of Subway started with a $1,000 investment. When he died, he was worth over $2-Billion.