On August 28, 2004, more than 10 unidentified flying objects were seen over Las Piñas, Metro Manila, Philippines at approximately 7 PM.

This case matters because it is a documented mass event whose object identity remains unresolved.
Documented
On August 28, 2004, more than 10 unidentified flying objects were seen over Las Piñas, Metro Manila, Philippines at approximately 7 PM.
Debated
The identity of the object
Debated
The adequacy of the conventional explanation
Unverified
Extraterrestrial origin
Unverified
Any claim stronger than the record supports
Sources are kept in separate layers: official and contemporary material is documented; secondary UFO literature is treated as debated, not as primary evidence.
Secondary / debated material.
Documented source.
Secondary / debated material.