coverage. >> reporter: you and i know that this del ray section of alexandria is a quiet, very close-knit community. a sought after neighborhood. everybody knows your name in this neighborhood. popular coffee shops, bars, restaurants too. people congregated and sit on their porches and backyard decks. they know each other. they know nothing like what they saw and heard today. we have video that we've obtained from a man that was just out walking his dog this morning. picked up his cell phone and he shot the video of allth it is tough to watch at times, but here it is. listen and watch closely. [ gunfire ]