The TSA's 25 "viper" teams — for Visible Intermodal Prevention and Response — have run more than 9,300 unannounced checkpoints and other search operations in the last year.
In the Carolinas this year, TSA teams have checked people at the gangplanks of cruise ships, the entrance to NASCAR races, and at ferry terminals taking tourists to the Outer Banks.
"I'm mostly curious," said Barbara Spencer, 75, who was heading home to Chapel Hill after watching her grandson perform in a Christmas play. She asked the officers whether a terrorist threat had required the extra security. No, they replied.
