A Duke Health System Life Flight helicopter is pictured on the landing pad on top of Duke Hospital in this Jan. 18 file photo. A similar copter crashed in Perquimans County on Sept. 8, killing all three crew members and a passenger.
A Duke Health System Life Flight helicopter is pictured on the landing pad on top of Duke Hospital in this Jan. 18 file photo. A similar copter crashed in Perquimans County on Sept. 8, killing all three crew members and a passenger. Shawn Rocco Duke Health
A Duke Health System Life Flight helicopter is pictured on the landing pad on top of Duke Hospital in this Jan. 18 file photo. A similar copter crashed in Perquimans County on Sept. 8, killing all three crew members and a passenger. Shawn Rocco Duke Health