He then underwent secondary screening at the boarding gate for the KLM flight, according to officials of the Dutch airline.

CNN: STORY HIGHLIGHTS

He also said the suspect underwent secondary screening at the boarding gate for the KLM flight, according to officials of the Dutch airline.

CNN: Obama orders review of flight screenings

In addition, passengers must be prepared to present a local, state, or federal government-issued identification card at the boarding gate, along with the boarding pass.

CNN: FAA imposes new luggage restrictions

Travelers may be asked to show this ID at subsequent points, such as at the gate, along with their boarding passes.

CNN: FAA imposes new luggage restrictions

At the gate, agents can offer passenger the opportunity to check bags and, in return, offer earlier boarding.

FORBES: Will American's New Boarding Process Work? It Failed At Virgin America.