Probably because of >During the incident, two Iranian Air Force F-4 Phantom II jet interceptors reported losing instrumentation and communications as they approached the object. These were restored upon withdrawal.

>One of the aircraft also reported a temporary weapons systems failure while the crew was preparing to open fire.

These were explained away in the wikipedia article, but who knows the truth... Hidden away in another language.

> Military sighting

> Multiple points of observation from reliable sources. Visual AND radar observation

> "Natural" sources ruled out

> Military equipment going out on three occasions

> American military investigators

> US military satellite saw an IR anomaly at the same time on its own