The “warning signs” exhibited by this particular passenger included the following:
His name was Umar Farouk Abdulmutallab.
He’s Nigerian.
He’s a Muslim.
His name was Umar Farouk Abdulmutallab.
He boarded a plane in Lagos, Nigeria.
He paid nearly $3,000 in cash for his ticket.
He had no luggage.
His name was Umar Farouk Abdulmutallab.