Police said an attacker opened fire in DC’s #LoganCircle neighborhood Thursday morning, killing 1 person & injuring 4 others.… Interim #DC police chief Jeffery Carroll said the gunman opened fire at a #Vida Fitness gym near the intersection of 15th & P streets NW. The suspected attacker later barricaded himself inside a nearby apartment building, Carroll said, then shot himself after speaking to police for more than an hour. The person also fired shots through the apartment door at officers….