Catch Me If You Can is about someone who convinces everyone that he can really fly a plane while all along he's just a teenager.
My question is:
What is the difference between "while he's just a teenager" and "while all along he's just a teenager" in terms of meaning?
"All along" means "from the very beginning" according to a dictionary. So I guess "while all along he's just a teenager" might mean that "when he's just a teenager all along". Is that right?