Towers and bunkers are key defensive positions, and so we must hold as many as possible!  I want you to attack a tower or a bunker in Alterac Valley.$B$BTo do that, enter a tower with a Horde banner atop it.  You will see another enemy banner inside.  Pull out that banner, and a white Alliance banner will appear in its place.  Well done!$B$BAt that point your mission for me will be complete, but hold the area long enough, and if the Horde doesn't take it back, then it will be destroyed!