No need for 'worry'...TSA is on the job.
This is somewhat unusual since, as CNN points out, "The U.S. has spent billions of dollars beefing-up screening of passengers with scanners and background checks." Transportation Security Agency receives an annual budget of over $7 billion. It is fair enough to perform a review of security practices, to increase public confidence that nothing like the appalling situation at Egypt's Sharm el-Sheikh airport exists here, but the concerns cited by CNN run considerably deeper than that:
The worries in the U.S. lie partly in the fact that the Transportation Security Administration, which oversees air travel security, relies on the operators of the nation's more than 450 airports to do the vetting of aviation workers. The airports use TSA contractors to do background checks, including checking terrorism databases, legal immigration status and criminal histories.
A U.S. official with knowledge of American aviation security and its vulnerabilities says that while U.S. security is viewed as the gold standard, the screening of workers poses cause for worry.
"(The TSA) checkpoint is only one part of it. You can lock that front door all you want, if you've left the back window open it doesn't really matter," the official said.