Two Days, Two Cities, Two Massacres. El Paso, Tex, Shooting (2019), Dayton, Ohio, Shooting (2019), Murders, Attempted Murders and Homicides, Firearms, Immigration and Emigration, Hispanic-Americans, O'Rourke, Beto, Parkland, Fla, Shooting (2018), El Paso (Tex), Dayton (Ohio)