Alexandria shooting heroes credited with preventing massacre

The three Capitol Police officers who immediately returned fire when a gunman attacked a Republican baseball practice in Alexandria, Virginia, are being called heroes.Special Agents Crystal Griner, David Bailey and Henry Cabrera were on the scene when James T. Hodgkinson opened fire.Griner and Bailey rushed him, despite their own wounds.CBS News correspondent Chip Reid reports that as a member of the Republican leadership Rep. Steve Scalise travels with a protective detail of Capitol Police offi