Army investigation expected to reveal why low-flying military helicopters were used in response to DC protests

A long awaited Army fact-finding investigation is expected to shed new light on why military helicopters were authorized to fly at potentially dangerous low altitudes over protesters in Washington, DC, last June after the death of George Floyd, a move that fueled criticism over the broader federal response to unrest in the nation's capital and contributed to scrutiny that "informed" the service's preparations ahead of the January 6 attack months later, CNN has learned.