Here's why Gerry Adams didn't want the "dreaded" SSSS code on his boarding ... - JOE

JOE
Here's why Gerry Adams didn't want the "dreaded" SSSS code on his boarding ...
JOE
Gerry Adams tweeted an image of his boarding pass from a US airline on Thursday morning along with the caption: "Awwwhhhh! The dreaded SSSS. Aris." So what exactly does he mean by the "dreaded SSSS" and why was it printed on his boarding pass?