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... "This is unheard of," he said. "This has never happened before. The next step is to determine if there is a single, common thread to their research that ties them to a specific aspect of national security."

Kaku is also a well known television personality. He has appeared on cable news, late night and talk shows, along with several episodes of the History Channel's "Universe" and "Ancient Aliens" series. In 2009, he began hosting a weekly television series for the Science Channel "Sci Fi Science: Physics of the Impossible."

The most recent and prominent example of this trend is the mysterious disappearance of Air Force Maj. Gen. William Neil McCasland (Ret.). He went missing from his New Mexico home on Feb. 27, bringing only a handgun and a pair of boots with him. He left his phone, keys and glasses behind,

McCasland, 68, was the former commander of the Air Force Research Laboratory, and reportedly possessed top secret information on UFOs.

He had ties to the Los Alamos National Laboratory in the state. The lab famously developed nuclear weapons during the WWII-era Manhattan Project. It is a Department of Energy National Nuclear Security Administration (NNSA) facility and prides itself on breakthroughs in the nuclear technology space.

Two other former employees of the lab have also gone missing. ...

News of the pattern of disappearances has made its way to the White House, which addressed it on Friday.

"In light of the recent and legitimate questions about these troubling cases and President Trump's commitment to the truth, the White House is actively working with all relevant agencies and the FBI to holistically review all of the cases together and identify any potential commonalities that may exist," Press Secretary Karoline Leavitt said in a Friday X post.

"No stone will be unturned in this effort, and the White House will provide updates when we have them." ...