Was understaffing at Reagan Airport control tower the reason for mid-air collision in Washington?

A day after the United States witnessed its deadliest aviation disaster in over two decades, a preliminary report from the Federal Aviation Administration (FAA) suggests the Reagan National Airport control tower — responsible for guiding pilots—was understaffed, with only one official on duty to communicate with the Army helicopter and the passenger plane that collided in mid-air, killing all 67 people

Was understaffing at Reagan Airport control tower the reason for mid-air collision in Washington?
A day after the United States witnessed its deadliest aviation disaster in over two decades, a preliminary report from the Federal Aviation Administration (FAA) suggests the Reagan National Airport control tower — responsible for guiding pilots—was understaffed, with only one official on duty to communicate with the Army helicopter and the passenger plane that collided in mid-air, killing all 67 people