A crowd of young people gathered on Halloween night in Washington’s Navy Yard neighborhood was run out of a park area by police and National Guard members. Authorities said some in the crowd were engaged in disorderly conduct. The Metropolitan Police Department says young people converged on the park Friday night. As night wore on, police said some people took part in fights, disrupted the flow of traffic and ignored instructions to remain on sidewalks. A video posted on X captured the chao...