Summary Parents are guarding schools after reports of ICE activity ICE presence has cut attendance and pushed some schools to cancel or move online DHS denies targeting schools, but families and educators report detentions nearby MINNEAPOLIS, Jan 17 (Reuters) - Peter Brown's gray mustache and beard were matted with ice as he stood watch on a frigid Friday afternoon outside Green Central Elementary, not far from where a U.S. Immigration and Customs Enforcement agent fatally shot Renee Good last week.Wearing a neon green vest and equipped with a whistle and walkie-talkie, Brown, an 81-year-old retired lawyer who lives nearby,...