A massive crime scene remained cordoned off around Union Station in Kansas City Thursday morning, a day after a mass shooting turned the Chiefs’ Super Bowl parade and rally celebration into a tragedy. Police tape closed off a large no-entry zone. Garbage and folding chairs littered the grounds in front of Union Station, items that normally would have been swept away and removed by the morning. Twenty-two people were shot, including nine children, when gunfire erupted shortly before 2 p.m. near the end of the citywide celebration. About a dozen others were treated at hospitals for other injurie…