These new measures are in addition to significant increases in aviation security implemented since september 11 such as reinforced cockpit doors , deployment of federal air marshals , enhanced federalized baggage and passenger screening and armed federal flight deck officers piloting some jetliners 这些新措施是对9 ? 11事件以来大力增强的航空安全的进一步加强，已采取的措施包括加固驾驶舱门，部署空中警员，安排联邦雇员加强对行李和乘客的检查，以及由携带武器的联邦驾驶舱飞行官（
