NEW YORK — The announcement May 30 that the National Park Service will begin installing markers at places of importance to the history of lesbian, gay, bisexual and transgender Americans is a step toward including them in the national narrative — and components of education, supporters said. Interior Secretary Sally Jewell made the announcement at the Stonewall Inn, the scene of riots in June 1969 that are widely credited with starting the modern gay rights movement. Stonewall was made a national historic landmark in 2000, and June is widely celebrated as LGBT Pride Month. Jewell said the nation is on...