If you see these letters on your boarding pass, plan extra time at the airport! Ryan Seacrest shared in today's hack if your boarding pass has "SSSS" on it, you can expect to be extra screened at security.
It stands for Secondary Security Screening Selection. Expect a full body pat down, a metal detector, a body scan, a luggage inspection and sometimes even more.
It’s random so you never know when it might happen to you. And, no, TSA Pre-check will not get you out of it!