Three police officers were shot in southeast Washington‚ D.C. Wednesday morning by a suspect who remains barricaded‚ police said. The first call reporting an officer in need of assistance came through at 8:06 a.m.‚ a spokesperson for the DC Metropolitan Police told The Post. Authorities were executing an arresting warrant at a home when the suspect opened fire‚ sources told NBC 4. Shortly before 10 a.m.‚ the subject remained barricaded in the residence and continued to shoot at police‚ the...