At Johan's statement, Ben had the funny, if a little sick, image of a guy jogging around and having someone jump out behind a wall at him. It made him grin, even if that could actually happen to him, or someone he knew at any time.
He didn't know much about the Greeks either, they were foreigners so they didn't matter, or so he had been told.
He didn't know why the Program was important, but he figured it had some purpose. It wasn't his job to question why America had it done. If he had to take a guess, it was probably a way to promote patriotism, people did get excited over announcement days and the event itself.
However he didn't like Johan's tone on it, why would you question it? The government and military helped protect them from dangerous foreigners, sure they had been dealt a bad hand, but overall the country was safer. "I think it serves some purpose, otherwise they wouldn't do it."