Sky Ablaze With Cannonfire (Horde)

Objectives
Destroy the Alliance Siege Cannon.

Description
Oh! It's me! And, was it? I remember this!

I seem to have found myself in the middle of a battle between the Horde and the Alliance, which wouldn't USUALLY be a big deal, except for that enormous cannon that seems to be trained on me anytime I try to fly away.

Think you could take it out for me?

Completion
You did it! Now hurry along... if I remember this correctly, you don't have much time left!