After looking at the pic again, I am pretty sure think it's photo shopped - for one, bears come out of their dens around April (here at least) and as they den very high on the mountain sides there would be snow everywhere. Plus the mortar crew is not dressed for the cold.
Did I mention that the mortar is just lifting from the barrel of the launcher with no vapors or smoke?
Cool pic, just not buying it - why tf would a photographer stand directly above it when firing?
BTW
@macsnax, up here most black bear attacks on humans are primarily predatory in nature and for the most part fatal for the prey (us) - and a 7 Mag is a lousy bear round - not enough weight on the projectile to reliably break big bones & stop a critter determined to kill you.