Key US Air Force base closes airspace amid drone sightings

Drone activity caused officials to close airspace over one of the United States’ most critical Air Force bases for almost four hours late Friday and early Saturday, according to a base spokesperson and a Notice to Airmen posted on a federal website.

​ Drone activity caused officials to close airspace over one of the United States’ most critical Air Force bases for almost four hours late Friday and early Saturday, according to a base spokesperson and a Notice to Airmen posted on a federal website. Read More Breaking News, Latest News and Videos | CNN