Airport security

Quartz (March 23) -- In an invited Op-Ed article, Sheldon H. Jacobson, a professor of computer science at Illinois and recognized expert in airport security wrote: "When passenger screening at airports the United States and Europe intensified almost 15 years ago following the Sept. 11 attacks, advanced imaging technologies and enhanced procedures made airports and planes more secure. However, as targets become more secure, terrorists generally shift their own strategy, identifying and exploiting more vulnerable targets. The devastating attacks in Brussels this week highlight the lethal efficacy of such shifts: terrorists seek out locations that have softer security and where they can cause a lot of damage.