2003年1月15日，在美国伊利诺伊州奈帕威尔市市政大厅，由市长乔治·波莱多主持，举行了曹勇捐赠给该市的名作《自由》的揭幕式。仪式有美国海军陆战队仪仗队参加。市长授予曹勇奈帕威尔市荣誉市民称号，海军陆战队授予曹勇荣誉勋章。
　　Mayor George Predal of Naperville, Illinois, hosted an unveiling for the painting "Freedom" on January 15, 2003 in the town hall donated by Cao Yong. The ceremony was attended by the US Marine Corps's Guards of Honor. The Mayor presented Cao Yong with a Naperville honorary citizenship award. The Marine Corps also awarded him an honorary medal.