Summary: Students at Florida International University made a somber return to campus this week after spring break. They prayed at vigils and walked to a memorial erected near the site of last week’s pedestrian bridge collapse. READ MORE: Campuswide Vigil At FIU Honors Bridge Collapse Victims In the aftermath of the recovery, local and national officials are trying to piece together what could have caused the collapse. Miami-Dade Police and the National Transportation Safety Board are conducting separate
