COLUMBIA HEIGHTS, Minn. — Valley View Elementary School in Columbia Heights is in crisis. Its teachers and staff are more like front-line responders right now, as three of their students, a pre-schooler, a second grader, and a fifth grader, are now in immigration detention. At least 25 other families have had a parent detained, the school says, by immigration agents. "It's been chaotic for our whole staff," said the principal of Valley View, Jason Kuhlman.