President Joe Biden's administration has been cagey and less than fully forthcoming in response to growing public concerns about mysterious drone sightings above multiple states on the East Coast and elsewhere, though they have repeatedly insisted the unidentified crafts pose no threat to the public or national security.

According to one whistleblowing military expert, however, the ongoing situation has exposed one of our nation's greatest vulnerabilities to our adversaries -- an apparent inability to control our own airspace, Breitbart reported.

The expert further suspected that the mysterious drones, regardless of who was operating them, were likely based and launched domestically and were being utilized to conduct surveillance or to detect potential chemical, biological, radiological, or nuclear weapons.

Drones are likely of domestic origin

Fox News reported that former U.S. Marine Col. William Dunn, a former attack helicopter pilot and president of the Strategic Resilience Group consultancy, recently shared his expert opinion on the developing drones situation based on his three decades of military experience.

"The concern is definitely valid," Dunn said. "One thing I do believe, I believe the government knows the source of these drones, and I believe the source of these drones is from inside the U.S., especially the larger drones."

"It's very difficult to fly an airplane the size of a vehicle into the United States without being detected, so I believe the drones originate from inside the U.S.," he continued, particularly given their need to be refueled. "We have -- especially on the East Coast -- I'm very familiar with our air defense identification zone. … It's very difficult to fly anything into the United States. It's not impossible, but it's very difficult."

Drones are "looking for something" but also exposing vulnerabilities

"We're probably having U.S. drones, as well as some of these smaller drones, that are being flown in to do a specific purpose. Now, the question is, what are those drones doing? My belief is they're surveilling something," Dunn told Fox News.

"They're looking for something, either a chemical weapon, biological weapon or maybe radiation," he continued, as well as potentially "communications from terrorists," and noted, "You know, there's been a lot of talk about having an open southern border and a lot of talk that there's an imminent terrorist threat."

"We are telegraphing right now that we do not know where these drones are. We're telegraphing that we can fly these drones over U.S. bases and we can't do anything about it," Dunn warned. "Now, our adversaries hear that, and they see that now they can take a drone and fly over [a] base and do something terrible."

He suggested that the drones could be shot down, though that puts the public at risk from falling debris, but also noted that they can be taken down in one piece if authorities "zap it with a non-kinetic means" in a way that "wipes out their electricity" and renders them inoperable.

Biden admin dismissive of public's drone concerns

Whether any current government authorities and experts share the same concerns is unclear, at least based on the recent dismissive joint statement from the Defense Department, Federal Aviation Administration, FBI, and Homeland Security that decidedly downplayed the public's worries about the mysterious drone sightings over multiple states.

"Having closely examined the technical data and tips from concerned citizens, we assess that the sightings to date include a combination of lawful commercial drones, hobbyist drones, and law enforcement drones, as well as manned fixed-wing aircraft, helicopters, and stars mistakenly reported as drones," the agencies said. "We have not identified anything anomalous and do not assess the activity to date to present a national security or public safety risk over the civilian airspace in New Jersey or other states in the northeast."

"That said, we recognize the concern among many communities. We continue to support state and local authorities with advanced detection technology and support of law enforcement," they continued. "We urge Congress to enact counter-[Unmanned Aerial Systems] legislation when it reconvenes that would extend and expand existing counter-drone authorities to identify and mitigate any threat that may emerge."

As for the unexplained drone sightings over military facilities, the statement added, "DoD takes unauthorized access over its airspace seriously and coordinates closely with federal, state, and local law enforcement authorities, as appropriate. Local commanders are actively engaged to ensure there are appropriate detection and mitigation measures in place."