An apartment building in Arlington caught fire Monday morning but is now under control, Arlington Fire Department said. Crews are checking concealed spaces in the building to see if the fire extended to other areas, fire officials said. Crews arrived at the apartment building on the 3000 block of South Randolph Street just before 6 a.m., the fire department said. RELATED: 8-year-old boy in critical condition after burning house fire in SE DC The...