 She won a bronze medal in the 200m at the 1987 IAAF World Indoor Championships behind Heike Drechsler and Merlene Ottey.The highlight of her career was at the 1988 Seoul Olympics, where she won a silver medal in the 200m behind Florence Griffith-Joyner's still-standing world record of 21.34.Jackson ran a Jamaican record time of 21.72 seconds that was .01 seconds short of the pre-Olympic world record Griffith-Joyner broke.