For the second time in two weeks, vandals have broken the windows on dozens of parked cars at the train and bus station on Milwaukee’s west side.  Victims were told at least 40 cars were damaged Saturday overnight into Sunday morning.  Police think the vandals were looking for guns, because other valuable items weren’t taken.  The first cases of vandalism came Thanksgiving weekend.  Witnesses say personal belongings were spread all over the parking lot.  Security cameras were operating, but it isn’t clear if they will help investigators find the crooks.