Since that episode, the T.S.A. has begun swabbing the palms of some travelers to look for signs of explosives, and conducting more security checks at the gate, after passengers have cleared the checkpoints, to look for trouble.
Ty and Sheri Carpenter of Lafayette, La., cleared the checkpoint.
When asked to list their top frustrations with air travel, travelers chose these issues related to security: "the wait time to clear the T.S.A. checkpoint," "having to remove shoes, belts and jackets at the T.S.A. checkpoint" and "T.S.A. employees who are not friendly".
It took me just under eight minutes to clear the security checkpoint outside the Dizengoff Center in downtown Tel Aviv.
The view ahead begins to clear and the checkpoint appears.
But at the Clear checkpoints at the Indianapolis and Orlando international airports, a second concierge is stationed at the other side of the belt to help you collect your possessions and not lose track of anything in your frantic rush.
And once you clear the officer's checkpoint, your reverie on the river is likely to be interrupted by nothing more unsettling than a jutting log or the drooping bough of a water oak.
Airport retail experts say, however, that most passengers are unlikely to become captive customers until they have cleared the security checkpoint.
Then there was another attack on the airbase; this time the troops cleared the separatist checkpoint, breaking, claimed the protesters, a tacit agreement.
The SLS, Orion and ground systems programs all cleared those checkpoints in 2014 and 2015.
