There is no 100% conclusive proof of anything.
The resolution is just not that good.
Yes, there may have been a "spot" on the lens.
"UFO",means unidentified.
BUT, blow up the following to about 200% to 400%and think about it.
The "Martian Complex or factory"at the top of a hill, plus a landed silvery disc draft at the top of another hill in
another pic.
concentrate and look at the following three images.
but, there is lots more. I have 14 rover pics that are VERY interesting including these three. By the way,
I see additional "Martian complexes" or buildings in
other pics too besides above!!
frame#s 128287496, 127429816,128287181.
these #'s are from the middle part of the long nasa frame ID #'s. I am not talented enough for links,
but you'll get it if U try.
concentrate of these:
From Opportunity raw images ,Sol 1.
From Spirit raw images Sol 12, Sol 16,Sol1.
I am not crazy, I am seeing some weird things in
these photos.
I am NOT referring to the "Bedrock" stuff at all!!
this is just a media diversion and cover tactic.