> The simple presence of them might be enough of a deterrent
The planning for 9/11 took several years, $500k in financing, and had a lot of moving parts between recruiting, research, travel/visas, flight training etc. It's hard to believe that people motivated at that level would truly be deterred by what you see happening at the typical American airport these days.
The planning for 9/11 took several years, $500k in financing, and had a lot of moving parts between recruiting, research, travel/visas, flight training etc. It's hard to believe that people motivated at that level would truly be deterred by what you see happening at the typical American airport these days.