dan shawnessy is covering one of the biggest rivalries in sports. red sox and yankees here at fenway park. when you have that mix it s always combustible. people drinking, red sox and yankees fans going at each other. reporter: back in los angeles sweeping change is under way. on the way home we re talking about what we saw in the stands and the parking lot. it s sick. reporter: the sea of dodger blue will see an increased presence of lapd blue. the former l.a. police chief was hired to overhaul security which will include license plate scanners, observation towers, increased lighting and undercover operations. more focus on security off the field so fans can enjoy what s happening on it. miguel almaguer, nbc news, los angeles. now back to the midwest and the developing flooding. residents of north dakota and moorhead, minnesota are hoping they have done enough to protect