WASHINGTON — The National Transportation Safety Board and Federal Aviation Administration said Thursday that they would investigate the collisions of two Amazon Prime Air delivery drones with the boom of a crane in Tolleson, Arizona, a day earlier. Amazon began drone deliveries in the Phoenix metro area’s West Valley from its same-day site in Tolleson in November, allowing customers to purchase an eligible item weighing 5 pounds or less and receive it by drone in under an hour.

See Full Page