ABC's Mireya Villarreal is in Texas with the latest on catastrophic flooding; The best times to travel as a record-breaking number of Americans take to the roads and skies for Fourth of July weekend; Dr. Mike Heithaus joins us to talk National Geographic's 'Investigation Shark Attack' and how to stay safe at the beach this summer; and more on ABC’s Good Morning America. ––– Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G ABC News is your daily source of breaking national