There are two areas of serious concern. This article touches on one of them. The other is the growing concern over middle-eastern types on aircraft doing what some think are 'dry runs' for the real thing to follow.
The one similarity between these two problems, is that the federal government is suspected of stonewalling on the serious nature of both. During the well-known incident with the Syrian Musicians, it was revealed that air flight crews say this happens quite often.
It's also suspected that the government has been apprehending some serious problem individuals coming accross our southern border, but is stonewalling that information as well.
In this day and age, the feds should be up front with what they are encountering, and deal with the problems represented by their findings.
Stonewalling on these issues became unacceptable long before, but certainly at the very least on 09/11/2001.
I am at a loss. What to do?
You are forgetting the serious concern that Islam extremist have infiltrated the US military. The foreign enemies are now domestic.