HASTINGSNJustin V <br/><br/>
Target hardening and terrorist signaling:  the case of aviation security/ 
Justin V Hastings and Ryan J Chan. 
 -  2013 
<br/><br/> This article examines the evolution of aviation security, and traces how al-Qaeda's views of airplanes and airports as targets have changed since 9/11. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>AVIATION SECURITY<br/>SECURITY MEASURES<br/>TERRORISM<br/>AL QAEDA