CHICAGO >> With no World Cup to prepare for, the United States announced a roster devoid of the veterans who failed to qualify for this year's tournament and filled with youth who could take the field 41/2 years from now in Qatar.Midfielder Julian Green returns to the U.S. national team for the first time in two years, joining star midfielder Christian Pulisic in the group picked for the May 28 exhibition against Bolivia at Chester, Pennsylvania, outside Philadelphia.