In Chicago, San Francisco and New York, advertising’s pioneering women strolled into Adweek’s photo shoot in a celebratory mood. After all, many of them knew each other back in the day. They’d risen together and supported each other as they overcame difficult odds to be The First—the first female and African-American chief executive at Starcom MediaVest Group, the first African American to serve as an IPG company officer, the first to launch a multicultural marketing group at Young & Rubicam, the first woman to become creative director at Leo Burnett and the first woman elected to its board, to name just a few. “As a woman, as a Latina, who practiced a pioneering specialty, Hispanic marketing, it was a triple challenge,” recalls Daisy Expósito-Ulla, who headed up Y&R’s The Bravo…