NTSB investigators have recovered the engines and cockpit voice recorder (CVR) of the Learjet 55 that crashed on Jan. 31 in Philadelphia, killing at least seven people.

It was a normal Friday night at Soans Christian Academy in Northeast Philadelphia. As the day was winding down, 10-year-old Andre Howard III's dad arrived to pick him up. "It's crazy how you say goodbye to one person and then finding out the next day you don't know if you're going to say hello again," Tatiana Rodriguez said.