Some selection criteria for SSSS are:
Passengers with a one-way reservation.[6]
Passengers who pay cash for their tickets.[7]
Passengers who book reservations the day of their flight.
Random selection, according to TSA spokeswoman Amy Von Walter in 2004,[5] and as suggested by a 2003 DOI newsletter.[8]
我有次改签当天下午的UA836也被SSSS了