Have a look at the rightmost 12" mortar (just besides the blue barrel):
Taiwan
Poland
Portugal
Notice the inverted "V" in the plastic covering the mortar. Unless La Ronde crew always puts the plastic in the exact same fashion, one can't help but wonder that this particular mortar has not been fired so far.
Therefore, although it appears loaded, I guess that the plastic is merely used instead of a bucket.
Therefore, Macedo's only shot 8", as they pretended, and Paul is right : no 12" were used so far this year.
Mystery solved
