[design] mess hall

i was wondering about that hole in the roof of the mosul mess hall. now that the .us military has us believing there was a 'suicide bomber' that caused the blast, was that hole caused by the bomber rocketing him/herself through the roof from the floor of the mess hall?

from photos, that was a pretty big hole, and it seemed entirely logical that it was caused by a rocket attack - until the alternate theory was put forth ..