What kind of indentification do citizen infants need to travel on a plane within the USA?

I will be traveling from San Jose, CA to Cleveland, Ohio with my 3 month old son. What kind of identification do I need to bring with me to assure I have no issue traveling/boarding the plane with him.What kind of indentification do citizen infants need to travel on a plane within the USA?Just bring the child's birth certificate and you will be fine.What kind of indentification do citizen infants need to travel on a plane within the USA?People under 18 years old do not actually need to provide ID, certainly not a 3 month old.