Denmark on Saturday reported more mysterious drone sightings — this time over military installations, including its largest military base — after incursions at airports grounded flights this week. The NATO country is still mulling how to respond. In addition to the sightings in Denmark, Norway also had a reported run-in with drones. Norwegian police are reportedly investigating possible drone sightings near an air force base in central Norway, Reuters reported, adding that the base houses the country's F-35 fighter jets. Danish authorities said the drone incident was a "hybrid attack" that came from a "professional actor," according to the BBC....