DALLAS -- Students at El Centro College have had a hard time focusing ever since the Dallas police ambush shut down their campus.
Thursday morning, classes resumed at the downtown campus, but some buildings are still closed including the second floor of Building C, where Micah Johnson was cornered and killed by a bomb-wielding robot.
Earlier this week, the El Centro police chief did a walk through of the building, which was heavily damaged by the explosion.
"Everyone is going to have questions in their mind," explained one student. "Everyone is going to be in class thinking about what happened and where it happened."