Every year, a few days before Memorial Day, a coastal scientist known as Dr. Beach releases a list of what he considers the 10 best beaches in the U.S. Who is Dr. Beach, anyway? And how does he come up with this list? In this week's Associated Press Travel podcast "Get Outta Here," we interview Dr. Beach, aka Professor Stephen Leatherman, to find out who he is, how the list began, what his criteria and goals are in creating the list, and why so many beaches just don't make the cut.