History 18 Buildings, structures, etc 10 Social life and customs 10 Presidents' spouses 9 Women detectives 8 African Americans 6 Presidents 6 mer ... Fiction 5 Police 5 Politics and government 5 Vietnam Veterans Memorial (Washington, D.C.) 5 Women 5 Cross, Alex (Fictitious character) 4 Detective and mystery stories 4 Physicians 4 Political activity 4 Political fiction 4 Serial murderers 4 Terrorism 4 Women journalists 4 African American police 3 Assassination 3 Description and travel 3 Guidebooks 3 Jewish men 3 Journalists 3 Legislators 3 Museums 3 Police psychologists 3 Politicians 3 mindre ...