US wanted someone to perform that dare devil stunt, they didnt wanted to risk it on there pilots. Futhermore then wanted to see to what extent others can plan, kind of out of box of thinking test. This excersie helped them to collect the needful data which would have allowed them to configure there system further. Virtually they might have tested there system against the data recorded to validated there security is indeed working in such situation. On the otherhand the machos who pulled up this feat were indeed proud of there achievements, which they should be because they performed very well calculated risky maneuver. But this doesnt mean it was defeat of US security system in real terms. This kind of games are played by biggies all the time to test there security systems and capabilities of opponents.
Kudos to bravehearts, this would surely boost there morale and would further help them to build upon there tactics.