 For NPR News in the Twin Cities, I'm Emily Reese. The largest youth soccer tournament in North America kicks off tomorrow in Blaine. A heat wave is expected during the week-long event. Chandra Colvin reports. The National Sports Center will host the 39th Target USA Cup. Nearly 1,200 teams from 14 countries and 29 states will be competing. But goals won't be the only thing on the minds of players and coaches.