The conclusion of official investigations into the alleged sonic attacks could have enormous consequences and even trigger calls for a strong response from Washington.
The Biden administration is under pressure to unravel the mystery that has plagued its predecessors: is it against the use of microwaves or radio-wave weapons to attack the minds of US diplomats, spies, and military personnel?
The number of alleged attacks is increasing dramatically, and lawmakers and victims on both sides are demanding answers. But scientists and officials are still unsure who could be behind the attacks, if the symptoms were caused by unintentional surveillance equipment, or if the incidents were attacks.
The conclusion of the official investigations could have enormous consequences and even trigger calls for a strong response from the United States.
For now, the government is ensuring that it takes the matter seriously, is aggressively investigating, and will ensure that those affected have good medical care.
This problem is known as "Havana Syndrome" because the first incidents in 2016 affected the US Embassy staff in Cuba.
According to a Pentagon official who is not authorized to speak publicly before the government at least 130 cases are being investigated across the government, more than a dozen in the past year. The National Security Council is leading the investigation.
Affected people have reported headaches, dizziness, and symptoms consistent with concussions, some of which require months of medical treatment. Some say they heard a loud noise before the sudden onset of symptoms.
Particularly alarming are the revelations of at least two possible incidents in the Washington area, including a case near the White House in November where an official reported feeling dizzy.
The New York Times was the first to report on the increase in cases. CNN first reported an incident near the White House and another in November.
During the last months of the Donald Trump administration, Acting Secretary of Defense Chris Miller formed a team to investigate the incident after meeting with a soldier late last year. I was stabbed.
Miller told the Associated Press that he was highly trained and had been in combat before. This is an American, a member of the Department of Defense. At this point, you can't ignore it.
Defense and intelligence officials have publicly promised to find answers and better care for people with symptoms.
Defense Department spokesman Lt. Col. Thomas Campbell said the causes of any incident "are areas of active investigation." Authorities have not named a suspicious country, although some affected people suspect that Russia is involved.