from the history
Project Blue Book was the U.S. Air Force's formal, public effort to investigate UFO reports. Its declassified administrative records and case files are held by the National Archives. SignalDispatch knowledge base (documented): Project Blue Book: The U.S. Air Force formally investigated UFO reports through Project Blue Book.
The Air Force's published count says the program received 12,618 reports and left 701 categorized as unidentified. That directly contradicts the idea that every Blue Book case was explained. SignalDispatch knowledge base (contradicted): Project Blue Book: Project Blue Book explained every report it received.
Unidentified describes the state of an investigation. It means the available information did not settle on a conventional explanation. It does not, by itself, establish an extraterrestrial or exotic technological cause. SignalDispatch knowledge base (unsubstantiated): Project Blue Book: The unidentified Blue Book cases demonstrate extraterrestrial vehicles.
the last 24 hours
The monitored window did not add a primary record that could be assessed here. MSN and UNILAD Tech ran headlines about a fourth batch of Pentagon UFO files and newly declassified records. The supplied evidence contained headline metadata, not the underlying files, so it establishes that the reporting occurred but not what the reported material shows. MSN: Pentagon releases 4th batch of UFO files UNILAD Tech: Newly declassified records from Pentagon reveal America's largest 'UFO' waves throughout US
A U.S. Department of War search result titled Hercules Repair also appeared. The available metadata did not explain its relevance to UAP, so no conclusion can be drawn from the title alone. U.S. Department of War (.gov): Hercules Repair
where things stand
Project Blue Book is documented history. Its 701 unidentified cases remain unresolved in the administrative sense, but that category does not supply a cause.
For the current window, the evidence available to SignalDispatch did not materially change the public record. Reports of a new Pentagon release remain reports until the underlying files can be examined.