Incompetent State Department officials and poor enforcement of visa procedures that have been in place long before the personal computer, or even the jet airliner, are the problem here. And we aren't hearing a word about it.
Media outlets are really good at turning the screws on other publicity-seekers, but are addicted to promoting the work of terrorists because they all profit from generating the same fear that the terrorists thrive upon.
Napolitano's characterization and subsequent spin that "the system worked" in the case of the Detroit terror scare proves that she isn't qualified to be the head of Homeland Security in a post-9/11 world.
Through a series of poorly conceived programs, Immigration and Customs Enforcement has hijacked state criminal justice systems. It lets even arrests based on racial profiling be a direct route to deportation.