text:  Airports jam-packed to start the Independence Day travel rush. Some 3 million passengers expected to flood airports Friday. It's go time for millions of Americans taking off for the 4th, with record-breaking numbers of people packing airports from coast to coast. It's looking like a record-breaker on the roads, too. AAA says some 60 million will take their vacations by car. The national average for a gallon of regular, 350. About the same as this time last year. ABC's Alex Perez.