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Chicago residents Bill and Dana Lynch didn’t flinch to get back on a plane when fares dropped immediately after 9/11, but that has all changed now that they have a family.

"It’s the hassle factor getting through the airports with three young children is the biggest challenge and change for us, maybe the more limited flight schedule than it used to be," said Bill Lynch.

"Oh absolutely, and they are packed," said Dana Lynch.

People are thinking twice about whether they really need to fly or not.

"Especially California. Before taking a short commuter flight I consider driving," said Los Angeles resident Kevin Brogan.

Anyway you look it, 9/11 put the brakes on air travel as we knew it.

"It's made all sorts of inconveniences for travelers, at the same time it was financially devastating to the airlines, now 10 years later they are still recovering from that," said AP Aviation Reporter Scott Mayerowitz

In fact, airlines lost billions of dollars in seven of the past 10 years, compounded by a spate of bankruptcies and mergers, job and pay cuts, all while trying to make up the shortfall with a rash of nitpicky fees.

Air travel isn't the only mode of transportation impacted by 9/11. Buses and trains have seen a boom in business, while cruises are sailing tighter ships all around.

"Since 9/11, the security procedures around the world have increased. We’ve also incorporated that into the maritime industry with the ships, so the levels are actually equal the way we treat it on land and on ships at sea," said Seabourn Quest Chief Security Officer Mark Neale.

But one pressing question is still left hanging in the balance: Is it working?

"Is this making us any safer and people have been asking that for 10 years still because we don’t know," said Phil Derner of NYC Aviation.