 This was terrorist-related. Seven others have been hurt near the Williamsburg Bridge on the other side of the island from the Macy's fireworks display. A person of interest is in custody. In Washington, D.C., a musical performance, fireworks, and as WTOP's Jimmy Alexander reports on this July 4th. People from all around the world line Constitution Avenue here in the nation's capital to watch the National Independence Day Parade, including this couple from down under.