the ticker symbol RBK and was renamed Reebok International Limited. The brand established itself in professional tennis with the Newport Classic shoe, popularized by Boris Becker and John McEnroe, and the Revenge Plus, also known as the Club C. The company began expanding from tennis and aerobics shoes to running and basketball throughout the mid to late 1980s, the most significant segment of the athletic footwear industry. In 1986, Reebok switched its logo from the Union Jack it had since its founding, to the vector logo—an abstract Union Flag streak across a race track—which mirrored the design of the side flashes of its shoes. The switch signaled the transition of the company into a performance brand as it began licensing deals with professional athletes in the NBA and NFL. Reebok also began developing sports clothing and accessories, entered the college/pro sports arena, and introduced a line of children's athletic shoes called Weeboks. It acquired Rockport for $118.5 million in 1986. By mid-decade, Reebok's sales were about $1 billion, and it overtook Nike, Inc. as the largest athletic shoe manufacturer in the US before losing the top position in 1988. One of the company's most iconic technologies, the Reebok Pump, debuted in 1989 with more than 100 professional athletes wearing the footwear by 1992, including Shaquille O'Neal. Reebok worked with fitness professional Gin Miller in the late 1980s to develop Step Reebok, based on Miller's wooden prototype step and her ideas for step aerobics. The Step was evaluated in physiology trials undertaken by Drs. Lorna and Peter Francis at San Diego State University. In August 1989 the Step was ready, made in molded plastic by Sports Step of Atlanta with Reebok's name on it, and by March 1990, the step aerobics classes were attracting media attention. Miller promoted Step Reebok in person, touring the U.S. and demonstrating it at exercise studios. Step aerobics became widely popular, helping the company sell many thousands of adjustable-height step devices and millions of high-top shoes with ankle support. Step aerobics peaked in 1995 with 11.4 million people exercising in that style. Reebok named Carl Yankowski president and chief executive officer of the brand in 1998, replacing former president Robert Meers. Yankowski stepped down one year later to accept an executive position at another company. Reebok chairman and CEO Paul Fireman took over as president for the first time in 12 years. 2000s In 2001, Reebok