[2] In 1960, Dunn, along with her relay teammates Silvia Hunte, Carlota Gooden and Jean Holmes-Mitchell, were the first female athletes to represent Panama at the Olympics.

After she graduated from high school in 1961, Wilma Rudolph's coach, the legendary Ed Temple, offered her a track scholarship to train under him at Tennessee State University.

[6] In her final year at TSU, Dunn was a member of the women's track and field team that won the AAU National Indoor Championships at Madison Square Garden, New York City.

Dunn, Tyus, McGuire and Essie Crews made up the 640 yard relay team which won the event in a time of 1:11.7 after running a heat in a record-breaking 1:11.5.

[2][6] On 13 January 2000, in a statement which appeared in the newspaper El Siglo, the then-President of Panama, Mireya Moscoso, expressed her sincere appreciation to all Panamanian athletes who throughout the 20th century gave all of their effort to honour the country, nationally and internationally.