 through its airport security checkpoints in a single day. Experts say cheaper airfares and a stronger U.S. dollar are motivating Americans to fly and helping their vacation money go further. The results? Nine of the ten busiest air travel days in the TSA's history have occurred since Memorial Day weekend. Goodness gracious. Busy. Man, those cheaper airfares, though, just kind of wondering where they are. Not where you're going, I guess.