The TSA screened a record 3.1 million passengers on June 22, marking the busiest day in its history ahead of the July 4 travel surge. Over 18.5 million flyers are expected during the holiday period, with peak volume on July 2. TSA urges travelers to arrive early, carry proper ID, and pack smart. AAA also forecasts 72 million Americans traveling 50+ miles, making this one of the busiest summer holidays.