Sweetwine was one of the vanishingly small percentage of black nurses then serving in the USAF.
By chance that day the person who VERY VISIBLY saved the lives of a lot of Londoners. The person they, and the papers, came to refer to as the "Angel of Platform Six" was black.
By carrying out her duty, and through saving lives at Harrow, Lieutenant Sweetwine put another visible (at the time) crack in the ridiculous notion that somehow her ethnicity made her less capable at her job than others /18