Injuries to more than 700 last fall required extensive treatment: court filing
                                
                                
                                    (Newser) -
                                    Thousands of concertgoers were injured at the Astroworld festival in Houston last fall, a new court filing says. Lawyers handling a combined lawsuit said 732 people signed onto the suit received injuries that required "extensive medical treatment" during the  crowd surge , reports  ABC News . And 1,649 other claimants...