Thomas Robb (R), the national director of The Knights Party, a white nationalist group formerly named the Knights of the Ku Klux Klan, walks with his son Jason Robb to the new education center under construction on the grounds of the organisation's headquarters outside Harrison, Arkansas, U.S., March 10, 2019. REUTERS/Jim Urquhart SEARCH "URQUHART NATIONALISM" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.