June 12, 2018 4:31 pm Caught On Cam: School Bus Hammer Attack Wisconsin mom chases down school bus and attacks the vehicle with a hammer after an altercation on board involving her daughter. US & World Videos 2:23 Friend of John O'Keefe testifies in Karen Read trial 1:20 Police activity in Bridgewater connected to investigation 1:41 Karen Read trial Day 7: Canton police officers continue to testify 1:57 Tensions escalate as protests across Mass. colleges continue 2:36 Celtics blow out Cavs in Game 1