UFOs, nuclear radiation, or more? The bizarre conspiracy theories behind mysterious US drone sightings

Unexplained drone sightings are causing concern across the US. A CEO suggests the drones might be searching for a substance. He even links the drones to missing nuclear warheads. A software engineer believes drones may be interfering with car clocks via GPS. A family reported their car clock reset after a drone sighting. Authorities are investigating these incidents.