 Today's also expected to be the busiest travel day of the summer. The TSA expects to screen more than 3 million people. ABC's Jacqueline Lee is at LAX and says many more are driving. When we look at gas prices, the national average is currently sitting at $3.51 a gallon. But here in California, it is slightly higher at $4.79 a gallon. But it is lower than it was this time last year. You're listening to ABC News.