Usually UFO activity is strongly correlated with political crisis (a.k.a. distraction strategy).
In this case, my guess would be Iraq.
P.S. At least one quoted 'researcher' (in fox article) is incorrect in saying
"This is historic news," Maussan said. "Hundreds of videos [of UFOs] exist, but none had the backing of the armed forces of any country. ... The armed forces don't perpetuate frauds."
Nothing at all is historic about that. Mexico and Brazil are long known because of their army supporting UFO cases, and several very persuasive cases exist of their officers testifying, along with official film footage/pictures.
Look it up with google, I lost my links a while back, but was once very interested in this stuff.