The Kansas City Chiefs’ Super Bowl celebration has become the latest backdrop for a mass shooting as gunfire sent fans scrambling for cover and left 21 people wounded and one woman dead. At least eight children are among those who were shot. Wednesday’s shooting outside the city’s historic Union Station happened despite the presence of more than 800 police officers on hand for the parade. Police say three people were taken into custody and firearms were recovered. But no details have been given about those who were detained or a possible motive.