<p>               FILE - In this Aug. 19, 2018, file photo, Grace McCallum competes on the uneven bars at the U.S. Gymnastics Championships in Boston. McCallum is getting a showcase at the American Cup. The youngest member of the U.S. women's gymnastics team that won a gold medal at the 2018 world championships headlines the field for the annual exhibition, which will be held March 2 at the Greensboro Coliseum in North Carolina.(AP Photo/Elise Amendola, File)             </p>
{}