They don't send the USNTDP U-18 team. They prioritize the U-18 WJC in May. The USNTDP kids have a long season, and entering their U-18 year have spent a significant time away from home, some for the first time. Considering the USNTDP kids go to school in Michigan, they don't finish the school year and can go home until early June. Calling them in for a tournament in early-August that used to be in the Czech Republic would be giving these kids maybe 4 to 6 weeks to actually go home and see family. Plus, most of these kids next year will have all the pre-draft stuff. Giving them until late-August to report back probably helps avoid burnout. Although, a bunch of the CHL kids have a similar burden, although, outside of the WHL kids, most are in reasonable proximity to their parents.