Parents, pastors, politicians and educators will join a Muslim imam at a mosque Friday in Oakland County, Michigan, to pray and discuss how to make their schools and community safer in an era of mass school shootings. The Muslim Unity Center, a mosque in the wealthy Detroit suburb of Bloomfield Hills, is hosting an "Interfaith Prayers and Symbolic Walkout Vigil" April 20 that feeds off of the anti-gun fervor created in the wake of the Parkland High School mass shooting that killed 17 students in February.