The vast majority of airport employees with direct access to the tarmac and airplanes do not go through any daily security screening, and only two of the country's major airports have systems in place that require all employees with secure access to pass through metal detectors, a CNN investigation has found.


원문출처 : http://edition.cnn.com/2015/02/02/us/airport-security-investigation/index.html?eref=edition