This is not a heartening story, federal investigators were able to bring bomb making components through security at all  21 airports they tested. This is very disheartening after all that has been spent and done on airline and airport security.

Imagine an explosion strong enough to blow a car’s trunk apart, caused by a bomb inside a passenger plane. Government sources tell NBC News that federal investigators recently were able to carry materials needed to make a similar homemade bomb through security screening at 21 airports.

In all 21 airports tested, no machine, no swab, no screener anywhere stopped the bomb materials from getting through. Even when investigators deliberately triggered extra screening of bags, no one discovered the materials.

read the rest at MSNBC.com.