The gunman who killed five people at Fort Lauderdale-Hollywood International Airport exposed security vulnerabilities at airport public areas that were once an afterthought, experts say. When National Guardsman Esteban Santiago allegedly killed five people and injured eight others after grabbing a gun from his luggage and loading it in a bathroom, his murderous spree highlighted a point of weakness: areas outside of screening checkpoints such as baggage claims, check-in counters and passenger pickup zones where security is comparatively light.