Everything is back to normal at Princeton University on Wednesday morning after a bomb threat put the Ivy League campus on lockdown.
The threat was called into the university Tuesday morning. The caller said multiple bombs had been placed throughout the campus at unspecified locations.
The threat was deemed credible, so close to 7,000 people were forced to leave.
After an exhaustive eight-hour search, police say they found nothing.
Tuesday's threat at Princeton was just one of four that happened across the country.